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/Problem15_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:27,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:27,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:27,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:27,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:27,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:27,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:27,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:27,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:27,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:27,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:27,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:27,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:27,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:27,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:27,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:27,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:27,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:27,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:27,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:27,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:27,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:27,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:27,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:27,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:27,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:27,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:27,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:27,973 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 00:07:27,993 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:27,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:27,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:27,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:27,996 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:27,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:27,996 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:27,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:27,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:27,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:27,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:27,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:27,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:27,999 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:27,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:27,999 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:27,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:27,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:28,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:28,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:28,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:28,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:28,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:28,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:28,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:28,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:28,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:28,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:28,002 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 00:07:28,329 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:28,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:28,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:28,355 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:28,355 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:28,356 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-10-15 00:07:28,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd27bce5b/eeeecf55d4eb4e1da66aefb372aecf15/FLAG4a9c546d5 [2019-10-15 00:07:29,091 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:29,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-10-15 00:07:29,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd27bce5b/eeeecf55d4eb4e1da66aefb372aecf15/FLAG4a9c546d5 [2019-10-15 00:07:29,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd27bce5b/eeeecf55d4eb4e1da66aefb372aecf15 [2019-10-15 00:07:29,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:29,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:29,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:29,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:29,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:29,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:29" (1/1) ... [2019-10-15 00:07:29,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b5c0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:29, skipping insertion in model container [2019-10-15 00:07:29,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:29" (1/1) ... [2019-10-15 00:07:29,289 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:29,381 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:30,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:30,291 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:30,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:30,629 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:30,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30 WrapperNode [2019-10-15 00:07:30,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:30,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:30,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:30,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:30,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (1/1) ... [2019-10-15 00:07:30,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (1/1) ... [2019-10-15 00:07:30,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (1/1) ... [2019-10-15 00:07:30,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (1/1) ... [2019-10-15 00:07:30,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (1/1) ... [2019-10-15 00:07:30,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (1/1) ... [2019-10-15 00:07:30,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (1/1) ... [2019-10-15 00:07:30,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:30,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:30,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:30,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:30,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (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 00:07:30,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:30,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:30,954 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:30,955 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:30,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:30,956 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:30,956 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:34,522 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:34,522 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:34,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:34 BoogieIcfgContainer [2019-10-15 00:07:34,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:34,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:34,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:34,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:34,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:29" (1/3) ... [2019-10-15 00:07:34,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac80d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:34, skipping insertion in model container [2019-10-15 00:07:34,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:30" (2/3) ... [2019-10-15 00:07:34,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac80d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:34, skipping insertion in model container [2019-10-15 00:07:34,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:34" (3/3) ... [2019-10-15 00:07:34,533 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2019-10-15 00:07:34,544 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:34,554 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:34,568 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:34,599 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:34,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:34,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:34,600 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:34,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:34,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:34,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:34,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 00:07:34,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:34,641 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, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:34,643 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1512840592, now seen corresponding path program 1 times [2019-10-15 00:07:34,659 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:34,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179773403] [2019-10-15 00:07:34,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:34,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:34,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:35,030 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 00:07:35,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179773403] [2019-10-15 00:07:35,032 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:35,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:35,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264613375] [2019-10-15 00:07:35,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:35,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:35,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:35,059 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:40,571 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-15 00:07:40,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:40,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-10-15 00:07:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:40,600 INFO L225 Difference]: With dead ends: 1554 [2019-10-15 00:07:40,600 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 00:07:40,612 INFO L600 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 [2019-10-15 00:07:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 00:07:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-15 00:07:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 00:07:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-15 00:07:40,711 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 42 [2019-10-15 00:07:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:40,712 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-15 00:07:40,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-15 00:07:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 00:07:40,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:40,718 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, 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] [2019-10-15 00:07:40,718 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1983802676, now seen corresponding path program 1 times [2019-10-15 00:07:40,719 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:40,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611192378] [2019-10-15 00:07:40,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:40,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:40,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:40,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611192378] [2019-10-15 00:07:40,920 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:40,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:40,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046869989] [2019-10-15 00:07:40,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:40,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:40,929 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-10-15 00:07:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:45,570 INFO L93 Difference]: Finished difference Result 2631 states and 4588 transitions. [2019-10-15 00:07:45,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:45,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2019-10-15 00:07:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:45,584 INFO L225 Difference]: With dead ends: 2631 [2019-10-15 00:07:45,584 INFO L226 Difference]: Without dead ends: 1940 [2019-10-15 00:07:45,588 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 00:07:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2019-10-15 00:07:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1937. [2019-10-15 00:07:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2019-10-15 00:07:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2945 transitions. [2019-10-15 00:07:45,665 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2945 transitions. Word has length 111 [2019-10-15 00:07:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:45,668 INFO L462 AbstractCegarLoop]: Abstraction has 1937 states and 2945 transitions. [2019-10-15 00:07:45,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2945 transitions. [2019-10-15 00:07:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 00:07:45,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:45,686 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, 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] [2019-10-15 00:07:45,689 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:45,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1476577176, now seen corresponding path program 1 times [2019-10-15 00:07:45,690 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:45,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229495823] [2019-10-15 00:07:45,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:45,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:45,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:45,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229495823] [2019-10-15 00:07:45,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:45,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:45,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163918293] [2019-10-15 00:07:45,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:45,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:45,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:45,922 INFO L87 Difference]: Start difference. First operand 1937 states and 2945 transitions. Second operand 5 states. [2019-10-15 00:07:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:50,363 INFO L93 Difference]: Finished difference Result 5802 states and 8992 transitions. [2019-10-15 00:07:50,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:50,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-10-15 00:07:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:50,387 INFO L225 Difference]: With dead ends: 5802 [2019-10-15 00:07:50,395 INFO L226 Difference]: Without dead ends: 3871 [2019-10-15 00:07:50,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2019-10-15 00:07:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3833. [2019-10-15 00:07:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3833 states. [2019-10-15 00:07:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5156 transitions. [2019-10-15 00:07:50,529 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5156 transitions. Word has length 128 [2019-10-15 00:07:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:50,530 INFO L462 AbstractCegarLoop]: Abstraction has 3833 states and 5156 transitions. [2019-10-15 00:07:50,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5156 transitions. [2019-10-15 00:07:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-15 00:07:50,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:50,541 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, 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, 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] [2019-10-15 00:07:50,541 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -839432913, now seen corresponding path program 1 times [2019-10-15 00:07:50,542 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:50,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669056772] [2019-10-15 00:07:50,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:07:51,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669056772] [2019-10-15 00:07:51,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725679177] [2019-10-15 00:07:51,027 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 00:07:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:51,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:07:51,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:07:51,562 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:07:51,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [670466859] [2019-10-15 00:07:51,812 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 409 [2019-10-15 00:07:51,873 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:07:51,874 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:08:02,573 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:08:02,576 INFO L272 AbstractInterpreter]: Visited 206 different actions 206 times. Never merged. Never widened. Performed 451 root evaluator evaluations with a maximum evaluation depth of 14. Performed 451 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:08:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:02,581 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates