/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/Problem18_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:58:04,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:58:04,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:58:04,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:58:04,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:58:04,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:58:04,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:58:04,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:58:04,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:58:04,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:58:04,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:58:04,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:58:04,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:58:04,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:58:04,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:58:04,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:58:04,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:58:04,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:58:04,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:58:04,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:58:04,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:58:04,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:58:04,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:58:04,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:58:04,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:58:04,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:58:04,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:58:04,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:58:04,227 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 22:58:04,260 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:58:04,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:58:04,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:58:04,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:58:04,265 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:58:04,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:58:04,266 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:58:04,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:58:04,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:58:04,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:58:04,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:58:04,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:58:04,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:58:04,269 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:58:04,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:58:04,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:58:04,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:58:04,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:58:04,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:58:04,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:58:04,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:58:04,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:58:04,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:58:04,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:58:04,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:58:04,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:58:04,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:58:04,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:58:04,272 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 22:58:04,534 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:58:04,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:58:04,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:58:04,565 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:58:04,565 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:58:04,566 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label48.c [2019-11-06 22:58:04,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a3e0bac/06bf29f70b8a42e3a3b3a5013360082c/FLAG7c41840ba [2019-11-06 22:58:05,316 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:58:05,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label48.c [2019-11-06 22:58:05,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a3e0bac/06bf29f70b8a42e3a3b3a5013360082c/FLAG7c41840ba [2019-11-06 22:58:05,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a3e0bac/06bf29f70b8a42e3a3b3a5013360082c [2019-11-06 22:58:05,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:58:05,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:58:05,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:05,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:58:05,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:58:05,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:05,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e92733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:05, skipping insertion in model container [2019-11-06 22:58:05,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:05" (1/1) ... [2019-11-06 22:58:05,459 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:58:05,582 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:58:07,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:07,126 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:58:07,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:07,621 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:58:07,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07 WrapperNode [2019-11-06 22:58:07,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:07,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:58:07,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:58:07,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:58:07,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (1/1) ... [2019-11-06 22:58:07,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (1/1) ... [2019-11-06 22:58:07,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (1/1) ... [2019-11-06 22:58:07,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (1/1) ... [2019-11-06 22:58:07,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (1/1) ... [2019-11-06 22:58:07,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (1/1) ... [2019-11-06 22:58:07,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (1/1) ... [2019-11-06 22:58:07,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:58:07,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:58:07,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:58:07,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:58:07,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (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 22:58:07,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:58:07,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:58:07,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:58:07,927 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:58:07,927 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:58:07,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:58:07,927 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:58:07,928 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:58:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:58:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:58:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:58:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:58:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:58:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:58:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:58:12,115 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:58:12,115 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:58:12,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:12 BoogieIcfgContainer [2019-11-06 22:58:12,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:58:12,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:58:12,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:58:12,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:58:12,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:05" (1/3) ... [2019-11-06 22:58:12,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8c6fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:12, skipping insertion in model container [2019-11-06 22:58:12,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:07" (2/3) ... [2019-11-06 22:58:12,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8c6fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:12, skipping insertion in model container [2019-11-06 22:58:12,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:12" (3/3) ... [2019-11-06 22:58:12,140 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label48.c [2019-11-06 22:58:12,154 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:58:12,168 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:58:12,182 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:58:12,238 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:58:12,238 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:58:12,239 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:58:12,239 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:58:12,239 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:58:12,239 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:58:12,239 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:58:12,240 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:58:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:58:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 22:58:12,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:12,307 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] [2019-11-06 22:58:12,309 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:12,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1448610927, now seen corresponding path program 1 times [2019-11-06 22:58:12,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:12,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426120319] [2019-11-06 22:58:12,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:12,732 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 22:58:12,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426120319] [2019-11-06 22:58:12,734 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:12,734 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:58:12,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908521570] [2019-11-06 22:58:12,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:58:12,745 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:58:12,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:58:12,763 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:58:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:17,155 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:58:17,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:58:17,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-11-06 22:58:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:17,238 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:58:17,238 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:58:17,246 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 22:58:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:58:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:58:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:58:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:58:17,415 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 60 [2019-11-06 22:58:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:17,417 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:58:17,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:58:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:58:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:58:17,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:17,431 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:17,432 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1160293157, now seen corresponding path program 1 times [2019-11-06 22:58:17,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:17,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305636505] [2019-11-06 22:58:17,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:17,744 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305636505] [2019-11-06 22:58:17,745 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:17,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:17,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460715376] [2019-11-06 22:58:17,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:17,747 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:17,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:17,748 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-11-06 22:58:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:23,020 INFO L93 Difference]: Finished difference Result 4288 states and 8023 transitions. [2019-11-06 22:58:23,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:23,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-11-06 22:58:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:23,051 INFO L225 Difference]: With dead ends: 4288 [2019-11-06 22:58:23,051 INFO L226 Difference]: Without dead ends: 2882 [2019-11-06 22:58:23,055 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 22:58:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2019-11-06 22:58:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2858. [2019-11-06 22:58:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2019-11-06 22:58:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 5137 transitions. [2019-11-06 22:58:23,154 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 5137 transitions. Word has length 149 [2019-11-06 22:58:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:23,156 INFO L462 AbstractCegarLoop]: Abstraction has 2858 states and 5137 transitions. [2019-11-06 22:58:23,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 5137 transitions. [2019-11-06 22:58:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:58:23,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:23,166 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:23,166 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:23,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash 610889412, now seen corresponding path program 1 times [2019-11-06 22:58:23,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:23,168 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32142335] [2019-11-06 22:58:23,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:23,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32142335] [2019-11-06 22:58:23,386 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:23,386 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:23,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311224296] [2019-11-06 22:58:23,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:23,387 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:23,388 INFO L87 Difference]: Start difference. First operand 2858 states and 5137 transitions. Second operand 6 states. [2019-11-06 22:58:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:32,618 INFO L93 Difference]: Finished difference Result 11626 states and 21824 transitions. [2019-11-06 22:58:32,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:58:32,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-11-06 22:58:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:32,672 INFO L225 Difference]: With dead ends: 11626 [2019-11-06 22:58:32,672 INFO L226 Difference]: Without dead ends: 8774 [2019-11-06 22:58:32,681 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:58:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2019-11-06 22:58:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 8718. [2019-11-06 22:58:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8718 states. [2019-11-06 22:58:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8718 states to 8718 states and 13631 transitions. [2019-11-06 22:58:32,926 INFO L78 Accepts]: Start accepts. Automaton has 8718 states and 13631 transitions. Word has length 150 [2019-11-06 22:58:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:32,927 INFO L462 AbstractCegarLoop]: Abstraction has 8718 states and 13631 transitions. [2019-11-06 22:58:32,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8718 states and 13631 transitions. [2019-11-06 22:58:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 22:58:32,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:32,932 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:58:32,933 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:32,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1350391872, now seen corresponding path program 1 times [2019-11-06 22:58:32,933 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:32,933 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839648028] [2019-11-06 22:58:32,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:33,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839648028] [2019-11-06 22:58:33,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648358778] [2019-11-06 22:58:33,148 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 22:58:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:33,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:58:33,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 22:58:33,530 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:33,695 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:58:33,695 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-11-06 22:58:33,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295630638] [2019-11-06 22:58:33,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:33,697 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:58:33,697 INFO L87 Difference]: Start difference. First operand 8718 states and 13631 transitions. Second operand 5 states. [2019-11-06 22:58:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:39,338 INFO L93 Difference]: Finished difference Result 24212 states and 39080 transitions. [2019-11-06 22:58:39,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:39,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2019-11-06 22:58:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:39,436 INFO L225 Difference]: With dead ends: 24212 [2019-11-06 22:58:39,436 INFO L226 Difference]: Without dead ends: 15500 [2019-11-06 22:58:39,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 433 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:58:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15500 states. [2019-11-06 22:58:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15500 to 13923. [2019-11-06 22:58:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13923 states. [2019-11-06 22:58:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13923 states to 13923 states and 18603 transitions. [2019-11-06 22:58:40,044 INFO L78 Accepts]: Start accepts. Automaton has 13923 states and 18603 transitions. Word has length 219 [2019-11-06 22:58:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:40,044 INFO L462 AbstractCegarLoop]: Abstraction has 13923 states and 18603 transitions. [2019-11-06 22:58:40,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:58:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 13923 states and 18603 transitions. [2019-11-06 22:58:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2019-11-06 22:58:40,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:40,054 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:40,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:58:40,258 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1101562771, now seen corresponding path program 1 times [2019-11-06 22:58:40,259 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:40,260 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77222017] [2019-11-06 22:58:40,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 230 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-06 22:58:40,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77222017] [2019-11-06 22:58:40,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663523542] [2019-11-06 22:58:40,588 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 [2019-11-06 22:58:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:40,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:58:40,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 22:58:40,937 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 230 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-06 22:58:41,132 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1017624480] [2019-11-06 22:58:41,138 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 342 [2019-11-06 22:58:41,212 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:58:41,213 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)