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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:18:36,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:18:36,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:18:36,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 17:18:36,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 17:18:36,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 17:18:36,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 17:18:36,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 17:18:36,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 17:18:36,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 17:18:36,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 17:18:36,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 17:18:36,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:18:36,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:18:36,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:18:36,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:18:36,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:18:36,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:18:36,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:18:36,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:18:36,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:18:36,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:18:36,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:18:36,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:18:36,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 17:18:36,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 17:18:36,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 17:18:36,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 17:18:36,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 17:18:36,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 17:18:36,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:18:36,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:18:36,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:18:36,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:18:36,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:18:36,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:18:36,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:18:36,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:18:36,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:18:36,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:18:36,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:18:36,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 17:18:36,183 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:18:36,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:18:36,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:18:36,184 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:18:36,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:18:36,185 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:18:36,185 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:18:36,185 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:18:36,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:18:36,186 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:18:36,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:18:36,187 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:18:36,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:18:36,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:18:36,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:18:36,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:18:36,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:18:36,188 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:18:36,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:18:36,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:18:36,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:18:36,189 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:18:36,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:18:36,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:18:36,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:18:36,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:18:36,190 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:18:36,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:18:36,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:18:36,190 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:18:36,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:18:36,233 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:18:36,237 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:18:36,238 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:18:36,239 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:18:36,239 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2019-09-09 17:18:36,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f69fa23/c527ba05e3784046bb93d8273d1e9527/FLAG9bd325096 [2019-09-09 17:18:37,168 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:18:37,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2019-09-09 17:18:37,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f69fa23/c527ba05e3784046bb93d8273d1e9527/FLAG9bd325096 [2019-09-09 17:18:37,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f69fa23/c527ba05e3784046bb93d8273d1e9527 [2019-09-09 17:18:37,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:18:37,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:18:37,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:18:37,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:18:37,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:18:37,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:18:37" (1/1) ... [2019-09-09 17:18:37,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf0c5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:37, skipping insertion in model container [2019-09-09 17:18:37,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:18:37" (1/1) ... [2019-09-09 17:18:37,696 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:18:37,878 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:18:39,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:18:39,448 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:18:40,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:18:40,137 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:18:40,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40 WrapperNode [2019-09-09 17:18:40,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:18:40,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:18:40,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:18:40,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:18:40,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (1/1) ... [2019-09-09 17:18:40,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (1/1) ... [2019-09-09 17:18:40,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (1/1) ... [2019-09-09 17:18:40,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (1/1) ... [2019-09-09 17:18:40,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (1/1) ... [2019-09-09 17:18:40,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (1/1) ... [2019-09-09 17:18:40,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (1/1) ... [2019-09-09 17:18:40,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:18:40,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:18:40,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:18:40,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:18:40,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (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 [2019-09-09 17:18:40,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:18:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:18:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:18:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:18:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:18:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:18:40,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:18:40,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:18:40,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:18:40,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:18:40,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:18:40,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:18:40,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:18:40,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:18:40,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:18:40,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:18:40,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:18:47,604 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:18:47,604 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:18:47,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:18:47 BoogieIcfgContainer [2019-09-09 17:18:47,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:18:47,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:18:47,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:18:47,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:18:47,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:18:37" (1/3) ... [2019-09-09 17:18:47,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fdba27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:18:47, skipping insertion in model container [2019-09-09 17:18:47,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:18:40" (2/3) ... [2019-09-09 17:18:47,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fdba27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:18:47, skipping insertion in model container [2019-09-09 17:18:47,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:18:47" (3/3) ... [2019-09-09 17:18:47,624 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label26.c [2019-09-09 17:18:47,636 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:18:47,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:18:47,666 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:18:47,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:18:47,698 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:18:47,698 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:18:47,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:18:47,699 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:18:47,699 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:18:47,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:18:47,699 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:18:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:18:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-09 17:18:47,765 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:18:47,766 INFO L399 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] [2019-09-09 17:18:47,768 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:18:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:18:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1734538977, now seen corresponding path program 1 times [2019-09-09 17:18:47,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:18:47,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:18:47,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:18:47,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:18:47,835 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:18:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:18:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:18:48,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:18:48,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:18:48,146 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:18:48,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:18:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:18:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:18:48,174 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-09-09 17:18:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:18:57,970 INFO L93 Difference]: Finished difference Result 2851 states and 4840 transitions. [2019-09-09 17:18:57,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:18:57,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-09-09 17:18:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:18:58,026 INFO L225 Difference]: With dead ends: 2851 [2019-09-09 17:18:58,027 INFO L226 Difference]: Without dead ends: 2758 [2019-09-09 17:18:58,028 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:18:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2019-09-09 17:18:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1919. [2019-09-09 17:18:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-09-09 17:18:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3313 transitions. [2019-09-09 17:18:58,190 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3313 transitions. Word has length 44 [2019-09-09 17:18:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:18:58,192 INFO L475 AbstractCegarLoop]: Abstraction has 1919 states and 3313 transitions. [2019-09-09 17:18:58,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:18:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3313 transitions. [2019-09-09 17:18:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-09 17:18:58,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:18:58,201 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:18:58,202 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:18:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:18:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1135589017, now seen corresponding path program 1 times [2019-09-09 17:18:58,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:18:58,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:18:58,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:18:58,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:18:58,205 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:18:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:18:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:18:58,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:18:58,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:18:58,378 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:18:58,380 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:18:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:18:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:18:58,381 INFO L87 Difference]: Start difference. First operand 1919 states and 3313 transitions. Second operand 5 states. [2019-09-09 17:19:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:19:06,663 INFO L93 Difference]: Finished difference Result 3632 states and 5664 transitions. [2019-09-09 17:19:06,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:19:06,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2019-09-09 17:19:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:19:06,692 INFO L225 Difference]: With dead ends: 3632 [2019-09-09 17:19:06,692 INFO L226 Difference]: Without dead ends: 3632 [2019-09-09 17:19:06,693 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:19:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2019-09-09 17:19:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3623. [2019-09-09 17:19:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-09-09 17:19:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 5644 transitions. [2019-09-09 17:19:06,817 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 5644 transitions. Word has length 113 [2019-09-09 17:19:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:19:06,819 INFO L475 AbstractCegarLoop]: Abstraction has 3623 states and 5644 transitions. [2019-09-09 17:19:06,819 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:19:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 5644 transitions. [2019-09-09 17:19:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 17:19:06,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:19:06,830 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:19:06,831 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:19:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:19:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1716133827, now seen corresponding path program 1 times [2019-09-09 17:19:06,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:19:06,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:06,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:19:06,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:06,834 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:19:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:19:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:19:07,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:19:07,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:19:07,047 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:19:07,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:19:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:19:07,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:19:07,050 INFO L87 Difference]: Start difference. First operand 3623 states and 5644 transitions. Second operand 5 states. [2019-09-09 17:19:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:19:15,681 INFO L93 Difference]: Finished difference Result 7191 states and 10294 transitions. [2019-09-09 17:19:15,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:19:15,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-09-09 17:19:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:19:15,718 INFO L225 Difference]: With dead ends: 7191 [2019-09-09 17:19:15,719 INFO L226 Difference]: Without dead ends: 7191 [2019-09-09 17:19:15,727 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:19:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2019-09-09 17:19:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 7086. [2019-09-09 17:19:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7086 states. [2019-09-09 17:19:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7086 states to 7086 states and 10105 transitions. [2019-09-09 17:19:15,922 INFO L78 Accepts]: Start accepts. Automaton has 7086 states and 10105 transitions. Word has length 115 [2019-09-09 17:19:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:19:15,922 INFO L475 AbstractCegarLoop]: Abstraction has 7086 states and 10105 transitions. [2019-09-09 17:19:15,923 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:19:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7086 states and 10105 transitions. [2019-09-09 17:19:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-09 17:19:15,925 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:19:15,925 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:19:15,926 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:19:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:19:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash -100028981, now seen corresponding path program 1 times [2019-09-09 17:19:15,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:19:15,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:15,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:19:15,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:15,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:19:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:19:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:19:16,054 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:19:16,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:19:16,055 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:19:16,055 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:19:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:19:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:19:16,056 INFO L87 Difference]: Start difference. First operand 7086 states and 10105 transitions. Second operand 4 states. [2019-09-09 17:19:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:19:27,078 INFO L93 Difference]: Finished difference Result 20401 states and 28459 transitions. [2019-09-09 17:19:27,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:19:27,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-09-09 17:19:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:19:27,169 INFO L225 Difference]: With dead ends: 20401 [2019-09-09 17:19:27,170 INFO L226 Difference]: Without dead ends: 20401 [2019-09-09 17:19:27,170 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:19:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20401 states. [2019-09-09 17:19:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20401 to 20362. [2019-09-09 17:19:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20362 states. [2019-09-09 17:19:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20362 states to 20362 states and 28337 transitions. [2019-09-09 17:19:27,665 INFO L78 Accepts]: Start accepts. Automaton has 20362 states and 28337 transitions. Word has length 159 [2019-09-09 17:19:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:19:27,666 INFO L475 AbstractCegarLoop]: Abstraction has 20362 states and 28337 transitions. [2019-09-09 17:19:27,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:19:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 20362 states and 28337 transitions. [2019-09-09 17:19:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-09 17:19:27,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:19:27,670 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:19:27,670 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:19:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:19:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash -597008431, now seen corresponding path program 1 times [2019-09-09 17:19:27,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:19:27,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:27,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:19:27,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:27,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:19:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:19:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:19:27,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:19:27,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:19:27,858 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:19:27,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:19:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:19:27,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:19:27,861 INFO L87 Difference]: Start difference. First operand 20362 states and 28337 transitions. Second operand 4 states. [2019-09-09 17:19:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:19:36,124 INFO L93 Difference]: Finished difference Result 26014 states and 32287 transitions. [2019-09-09 17:19:36,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:19:36,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-09-09 17:19:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:19:36,208 INFO L225 Difference]: With dead ends: 26014 [2019-09-09 17:19:36,208 INFO L226 Difference]: Without dead ends: 26014 [2019-09-09 17:19:36,209 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:19:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26014 states. [2019-09-09 17:19:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26014 to 26013. [2019-09-09 17:19:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26013 states. [2019-09-09 17:19:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26013 states to 26013 states and 32285 transitions. [2019-09-09 17:19:36,721 INFO L78 Accepts]: Start accepts. Automaton has 26013 states and 32285 transitions. Word has length 164 [2019-09-09 17:19:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:19:36,722 INFO L475 AbstractCegarLoop]: Abstraction has 26013 states and 32285 transitions. [2019-09-09 17:19:36,722 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:19:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26013 states and 32285 transitions. [2019-09-09 17:19:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-09-09 17:19:36,733 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:19:36,733 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:19:36,734 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:19:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:19:36,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2102942861, now seen corresponding path program 1 times [2019-09-09 17:19:36,734 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:19:36,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:36,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:19:36,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:19:36,738 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:19:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:19:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:19:37,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:19:37,273 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:19:37,274 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 329 with the following transitions: [2019-09-09 17:19:37,278 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2887], [2889], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3363], [3365], [3366], [3370], [3374], [3378], [3382], [3386], [3390], [3394], [3398], [3402], [3406], [3410], [3414], [3425], [3429], [3440], [3451], [3455], [3459], [3463], [3467], [3471], [3475], [3479], [3483], [3487], [3498], [3502], [3506], [3517], [3521], [3525], [3529], [3533], [3537], [3541], [3545], [3556], [3560], [3564], [3568], [3572], [3576], [3580], [3591], [3595], [3598], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:19:37,373 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:19:37,374 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:21:21,370 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:21:21,372 INFO L272 AbstractInterpreter]: Visited 169 different actions 169 times. Never merged. Never widened. Performed 210 root evaluator evaluations with a maximum evaluation depth of 18. Performed 210 inverse root evaluator evaluations with a maximum inverse evaluation depth of 18. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:21:21,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:21:21,377 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:23:28,725 INFO L227 lantSequenceWeakener]: Weakened 317 states. On average, predicates are now at 71.05% of their original sizes. [2019-09-09 17:23:28,725 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:23:28,792 INFO L420 sIntCurrentIteration]: We unified 327 AI predicates to 327 [2019-09-09 17:23:28,793 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:23:28,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:23:28,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:23:28,794 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:23:28,795 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:23:28,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:23:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:23:28,796 INFO L87 Difference]: Start difference. First operand 26013 states and 32285 transitions. Second operand 8 states. [2019-09-09 17:25:53,711 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.