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-f4eb214f-m [2019-10-13 20:11:34,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:34,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:34,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:34,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:34,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:34,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:34,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:34,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:35,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:35,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:35,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:35,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:35,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:35,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:35,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:35,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:35,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:35,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:35,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:35,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:35,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:35,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:35,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:35,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:35,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:35,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:35,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:35,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:35,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:35,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:35,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:35,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:35,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:35,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:35,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:35,057 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 [2019-10-13 20:11:35,080 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:35,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:35,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:35,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:35,083 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:35,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:35,083 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:35,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:35,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:35,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:35,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:35,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:35,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:35,086 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:35,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:35,086 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:35,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:35,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:35,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:35,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:35,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:35,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:35,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:35,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:35,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:35,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:35,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:35,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:35,089 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 [2019-10-13 20:11:35,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:35,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:35,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:35,415 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:35,416 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:35,417 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label48.c [2019-10-13 20:11:35,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0175a35f/42e31aa11a0f4f7795ce6877365507e8/FLAG9c7fa8e90 [2019-10-13 20:11:36,194 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:36,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label48.c [2019-10-13 20:11:36,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0175a35f/42e31aa11a0f4f7795ce6877365507e8/FLAG9c7fa8e90 [2019-10-13 20:11:36,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0175a35f/42e31aa11a0f4f7795ce6877365507e8 [2019-10-13 20:11:36,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:36,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:36,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:36,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:36,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:36,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:36" (1/1) ... [2019-10-13 20:11:36,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dba115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:36, skipping insertion in model container [2019-10-13 20:11:36,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:36" (1/1) ... [2019-10-13 20:11:36,359 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:36,497 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:37,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:37,515 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:37,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:37,988 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:37,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37 WrapperNode [2019-10-13 20:11:37,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:37,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:37,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:37,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:38,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (1/1) ... [2019-10-13 20:11:38,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (1/1) ... [2019-10-13 20:11:38,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (1/1) ... [2019-10-13 20:11:38,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (1/1) ... [2019-10-13 20:11:38,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (1/1) ... [2019-10-13 20:11:38,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (1/1) ... [2019-10-13 20:11:38,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (1/1) ... [2019-10-13 20:11:38,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:38,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:38,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:38,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:38,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (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 [2019-10-13 20:11:38,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:38,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:42,244 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:42,245 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:42,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:42 BoogieIcfgContainer [2019-10-13 20:11:42,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:42,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:42,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:42,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:42,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:36" (1/3) ... [2019-10-13 20:11:42,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fe1594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:42, skipping insertion in model container [2019-10-13 20:11:42,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:37" (2/3) ... [2019-10-13 20:11:42,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fe1594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:42, skipping insertion in model container [2019-10-13 20:11:42,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:42" (3/3) ... [2019-10-13 20:11:42,258 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label48.c [2019-10-13 20:11:42,271 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:42,287 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:42,302 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:42,353 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:42,353 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:42,353 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:42,353 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:42,353 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:42,353 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:42,354 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:42,354 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 20:11:42,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:42,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:42,419 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1448610927, now seen corresponding path program 1 times [2019-10-13 20:11:42,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:42,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114753968] [2019-10-13 20:11:42,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:42,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:42,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:42,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114753968] [2019-10-13 20:11:42,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:42,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:42,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080269672] [2019-10-13 20:11:42,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:42,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:42,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:42,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:42,838 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:47,467 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:47,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:47,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-10-13 20:11:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:47,504 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:47,505 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:47,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-13 20:11:47,666 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 60 [2019-10-13 20:11:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:47,666 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-13 20:11:47,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-13 20:11:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 20:11:47,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:47,674 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, 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] [2019-10-13 20:11:47,674 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1160293157, now seen corresponding path program 1 times [2019-10-13 20:11:47,675 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:47,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151542975] [2019-10-13 20:11:47,676 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:47,676 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:47,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:47,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151542975] [2019-10-13 20:11:47,964 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:47,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:47,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098007062] [2019-10-13 20:11:47,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:47,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:47,968 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-13 20:11:53,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:53,649 INFO L93 Difference]: Finished difference Result 4288 states and 8023 transitions. [2019-10-13 20:11:53,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:53,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-13 20:11:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:53,674 INFO L225 Difference]: With dead ends: 4288 [2019-10-13 20:11:53,675 INFO L226 Difference]: Without dead ends: 2882 [2019-10-13 20:11:53,680 INFO L600 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 [2019-10-13 20:11:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2019-10-13 20:11:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2858. [2019-10-13 20:11:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2019-10-13 20:11:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 5137 transitions. [2019-10-13 20:11:53,766 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 5137 transitions. Word has length 149 [2019-10-13 20:11:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:53,767 INFO L462 AbstractCegarLoop]: Abstraction has 2858 states and 5137 transitions. [2019-10-13 20:11:53,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 5137 transitions. [2019-10-13 20:11:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 20:11:53,771 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:53,772 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, 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] [2019-10-13 20:11:53,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 610889412, now seen corresponding path program 1 times [2019-10-13 20:11:53,773 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:53,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235023080] [2019-10-13 20:11:53,773 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:53,774 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:53,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:54,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235023080] [2019-10-13 20:11:54,015 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:54,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:54,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625545194] [2019-10-13 20:11:54,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:54,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:54,017 INFO L87 Difference]: Start difference. First operand 2858 states and 5137 transitions. Second operand 6 states. [2019-10-13 20:12:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:03,917 INFO L93 Difference]: Finished difference Result 11626 states and 21824 transitions. [2019-10-13 20:12:03,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:12:03,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-13 20:12:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:03,973 INFO L225 Difference]: With dead ends: 11626 [2019-10-13 20:12:03,973 INFO L226 Difference]: Without dead ends: 8774 [2019-10-13 20:12:03,984 INFO L600 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 [2019-10-13 20:12:03,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2019-10-13 20:12:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 8718. [2019-10-13 20:12:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8718 states. [2019-10-13 20:12:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8718 states to 8718 states and 13631 transitions. [2019-10-13 20:12:04,301 INFO L78 Accepts]: Start accepts. Automaton has 8718 states and 13631 transitions. Word has length 150 [2019-10-13 20:12:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:04,301 INFO L462 AbstractCegarLoop]: Abstraction has 8718 states and 13631 transitions. [2019-10-13 20:12:04,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:12:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8718 states and 13631 transitions. [2019-10-13 20:12:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-13 20:12:04,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:04,312 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:12:04,313 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1350391872, now seen corresponding path program 1 times [2019-10-13 20:12:04,314 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:04,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517687977] [2019-10-13 20:12:04,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:04,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:04,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:12:04,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517687977] [2019-10-13 20:12:04,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675930452] [2019-10-13 20:12:04,642 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 [2019-10-13 20:12:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:04,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:12:04,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:12:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 20:12:04,937 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:12:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:12:05,109 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:12:05,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-13 20:12:05,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204773247] [2019-10-13 20:12:05,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:12:05,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:12:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:12:05,114 INFO L87 Difference]: Start difference. First operand 8718 states and 13631 transitions. Second operand 5 states. [2019-10-13 20:12:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:10,515 INFO L93 Difference]: Finished difference Result 24212 states and 39080 transitions. [2019-10-13 20:12:10,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:10,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2019-10-13 20:12:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:10,582 INFO L225 Difference]: With dead ends: 24212 [2019-10-13 20:12:10,583 INFO L226 Difference]: Without dead ends: 15500 [2019-10-13 20:12:10,614 INFO L600 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 [2019-10-13 20:12:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15500 states. [2019-10-13 20:12:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15500 to 13923. [2019-10-13 20:12:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13923 states. [2019-10-13 20:12:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13923 states to 13923 states and 18603 transitions. [2019-10-13 20:12:10,954 INFO L78 Accepts]: Start accepts. Automaton has 13923 states and 18603 transitions. Word has length 219 [2019-10-13 20:12:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:10,955 INFO L462 AbstractCegarLoop]: Abstraction has 13923 states and 18603 transitions. [2019-10-13 20:12:10,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:12:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 13923 states and 18603 transitions. [2019-10-13 20:12:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2019-10-13 20:12:10,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:10,965 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, 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] [2019-10-13 20:12:11,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:12:11,171 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1101562771, now seen corresponding path program 1 times [2019-10-13 20:12:11,171 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:11,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321153426] [2019-10-13 20:12:11,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:11,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:11,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 230 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-13 20:12:11,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321153426] [2019-10-13 20:12:11,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031806665] [2019-10-13 20:12:11,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:12:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat