/usr/bin/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/Problem02_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:34:10,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:34:10,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:34:10,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:34:10,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:34:10,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:34:10,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:34:10,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:34:10,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:34:10,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:34:10,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:34:10,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:34:10,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:34:10,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:34:10,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:34:10,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:34:10,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:34:10,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:34:10,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:34:10,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:34:10,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:34:10,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:34:10,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:34:10,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:34:11,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:34:11,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:34:11,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:34:11,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:34:11,020 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 [2019-11-06 22:34:11,044 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:34:11,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:34:11,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:34:11,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:34:11,047 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:34:11,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:34:11,047 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:34:11,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:34:11,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:34:11,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:34:11,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:34:11,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:34:11,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:34:11,050 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:34:11,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:34:11,050 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:34:11,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:34:11,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:34:11,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:34:11,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:34:11,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:34:11,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:34:11,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:34:11,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:34:11,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:34:11,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:34:11,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:34:11,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:34:11,053 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 [2019-11-06 22:34:11,343 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:34:11,361 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:34:11,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:34:11,366 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:34:11,367 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:34:11,367 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-11-06 22:34:11,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526f1a941/a851772ba35b404b950303a01c97311a/FLAGeddf0758c [2019-11-06 22:34:11,977 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:34:11,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-11-06 22:34:11,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526f1a941/a851772ba35b404b950303a01c97311a/FLAGeddf0758c [2019-11-06 22:34:12,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526f1a941/a851772ba35b404b950303a01c97311a [2019-11-06 22:34:12,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:34:12,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:34:12,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:12,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:34:12,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:34:12,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:12" (1/1) ... [2019-11-06 22:34:12,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba9d4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:12, skipping insertion in model container [2019-11-06 22:34:12,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:12" (1/1) ... [2019-11-06 22:34:12,325 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:34:12,377 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:34:12,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:12,912 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:34:13,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:13,067 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:34:13,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13 WrapperNode [2019-11-06 22:34:13,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:13,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:34:13,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:34:13,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:34:13,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (1/1) ... [2019-11-06 22:34:13,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (1/1) ... [2019-11-06 22:34:13,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (1/1) ... [2019-11-06 22:34:13,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (1/1) ... [2019-11-06 22:34:13,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (1/1) ... [2019-11-06 22:34:13,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (1/1) ... [2019-11-06 22:34:13,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (1/1) ... [2019-11-06 22:34:13,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:34:13,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:34:13,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:34:13,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:34:13,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (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 [2019-11-06 22:34:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:34:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:34:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:34:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:34:13,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:34:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:34:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:34:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:34:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:34:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:34:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:34:14,469 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:34:14,470 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:34:14,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:14 BoogieIcfgContainer [2019-11-06 22:34:14,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:34:14,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:34:14,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:34:14,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:34:14,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:34:12" (1/3) ... [2019-11-06 22:34:14,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27806cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:14, skipping insertion in model container [2019-11-06 22:34:14,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:13" (2/3) ... [2019-11-06 22:34:14,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27806cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:14, skipping insertion in model container [2019-11-06 22:34:14,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:14" (3/3) ... [2019-11-06 22:34:14,492 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label22.c [2019-11-06 22:34:14,508 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:34:14,520 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:34:14,535 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:34:14,579 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:34:14,580 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:34:14,582 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:34:14,582 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:34:14,583 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:34:14,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:34:14,583 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:34:14,583 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:34:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:34:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 22:34:14,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:14,646 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:34:14,648 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1125290487, now seen corresponding path program 1 times [2019-11-06 22:34:14,664 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:14,664 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342746564] [2019-11-06 22:34:14,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:15,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342746564] [2019-11-06 22:34:15,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:15,182 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:34:15,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795870185] [2019-11-06 22:34:15,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:15,192 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:15,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:15,215 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:34:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:16,248 INFO L93 Difference]: Finished difference Result 623 states and 1065 transitions. [2019-11-06 22:34:16,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:16,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2019-11-06 22:34:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:16,276 INFO L225 Difference]: With dead ends: 623 [2019-11-06 22:34:16,277 INFO L226 Difference]: Without dead ends: 325 [2019-11-06 22:34:16,290 INFO L630 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 [2019-11-06 22:34:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-11-06 22:34:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2019-11-06 22:34:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:34:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 473 transitions. [2019-11-06 22:34:16,371 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 473 transitions. Word has length 103 [2019-11-06 22:34:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:16,372 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 473 transitions. [2019-11-06 22:34:16,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 473 transitions. [2019-11-06 22:34:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:34:16,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:16,379 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:34:16,379 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash 93763940, now seen corresponding path program 1 times [2019-11-06 22:34:16,380 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:16,380 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669714040] [2019-11-06 22:34:16,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:16,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669714040] [2019-11-06 22:34:16,530 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:16,530 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:34:16,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064326098] [2019-11-06 22:34:16,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:34:16,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:16,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:34:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:34:16,533 INFO L87 Difference]: Start difference. First operand 321 states and 473 transitions. Second operand 6 states. [2019-11-06 22:34:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:17,386 INFO L93 Difference]: Finished difference Result 955 states and 1447 transitions. [2019-11-06 22:34:17,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:34:17,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-06 22:34:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:17,395 INFO L225 Difference]: With dead ends: 955 [2019-11-06 22:34:17,395 INFO L226 Difference]: Without dead ends: 640 [2019-11-06 22:34:17,398 INFO L630 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 [2019-11-06 22:34:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-11-06 22:34:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 623. [2019-11-06 22:34:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-06 22:34:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 903 transitions. [2019-11-06 22:34:17,481 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 903 transitions. Word has length 123 [2019-11-06 22:34:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:17,483 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 903 transitions. [2019-11-06 22:34:17,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:34:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 903 transitions. [2019-11-06 22:34:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:34:17,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:17,496 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:34:17,496 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:17,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1391612558, now seen corresponding path program 1 times [2019-11-06 22:34:17,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:17,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680086551] [2019-11-06 22:34:17,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:17,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680086551] [2019-11-06 22:34:17,766 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:17,766 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:34:17,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400796553] [2019-11-06 22:34:17,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:17,767 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:17,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:17,768 INFO L87 Difference]: Start difference. First operand 623 states and 903 transitions. Second operand 3 states. [2019-11-06 22:34:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:18,358 INFO L93 Difference]: Finished difference Result 1679 states and 2464 transitions. [2019-11-06 22:34:18,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:18,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-11-06 22:34:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:18,367 INFO L225 Difference]: With dead ends: 1679 [2019-11-06 22:34:18,367 INFO L226 Difference]: Without dead ends: 1062 [2019-11-06 22:34:18,369 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2019-11-06 22:34:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 918. [2019-11-06 22:34:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-11-06 22:34:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1260 transitions. [2019-11-06 22:34:18,403 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1260 transitions. Word has length 124 [2019-11-06 22:34:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:18,403 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1260 transitions. [2019-11-06 22:34:18,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1260 transitions. [2019-11-06 22:34:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:34:18,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:18,407 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-11-06 22:34:18,407 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash -379164823, now seen corresponding path program 1 times [2019-11-06 22:34:18,408 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:18,408 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881308161] [2019-11-06 22:34:18,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:18,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881308161] [2019-11-06 22:34:18,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105441865] [2019-11-06 22:34:18,495 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 [2019-11-06 22:34:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:18,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:34:18,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:34:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:18,727 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:34:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:18,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1902882803] [2019-11-06 22:34:18,859 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 132 [2019-11-06 22:34:18,908 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:34:18,908 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)