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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:40,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:40,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:40,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:40,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:40,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:40,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:40,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:40,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:40,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:40,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:40,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:40,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:40,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:40,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:40,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:40,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:40,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:40,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:40,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:40,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:40,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:40,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:40,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:40,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:06:40,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:06:40,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:06:40,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:06:40,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:06:40,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:06:40,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:40,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:40,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:40,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:40,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:40,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:40,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:40,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:40,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:40,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:40,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:40,241 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 18:06:40,255 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:40,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:40,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:40,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:40,257 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:40,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:40,257 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:40,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:40,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:40,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:40,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:40,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:40,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:40,259 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:40,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:40,259 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:40,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:40,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:40,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:40,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:40,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:40,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:40,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:40,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:40,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:40,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:40,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:40,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:40,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:40,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:40,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:40,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:40,587 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:40,587 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:40,588 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-10-13 18:06:40,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56f72ec7/b04d4fa532b64d1c902ade0c460e50a2/FLAGad36d1b41 [2019-10-13 18:06:41,384 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:41,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-10-13 18:06:41,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56f72ec7/b04d4fa532b64d1c902ade0c460e50a2/FLAGad36d1b41 [2019-10-13 18:06:41,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56f72ec7/b04d4fa532b64d1c902ade0c460e50a2 [2019-10-13 18:06:41,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:41,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:41,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:41,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:41,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:41,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:41" (1/1) ... [2019-10-13 18:06:41,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596d6cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:41, skipping insertion in model container [2019-10-13 18:06:41,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:41" (1/1) ... [2019-10-13 18:06:41,548 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:41,671 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:42,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:42,960 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:43,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:43,418 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:43,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43 WrapperNode [2019-10-13 18:06:43,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:43,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:43,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:43,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:43,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (1/1) ... [2019-10-13 18:06:43,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (1/1) ... [2019-10-13 18:06:43,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (1/1) ... [2019-10-13 18:06:43,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (1/1) ... [2019-10-13 18:06:43,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (1/1) ... [2019-10-13 18:06:43,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (1/1) ... [2019-10-13 18:06:43,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (1/1) ... [2019-10-13 18:06:43,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:43,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:43,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:43,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:43,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (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 18:06:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:06:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:06:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:47,501 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:47,501 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:47,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:47 BoogieIcfgContainer [2019-10-13 18:06:47,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:47,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:47,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:47,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:41" (1/3) ... [2019-10-13 18:06:47,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7565aa79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:47, skipping insertion in model container [2019-10-13 18:06:47,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:43" (2/3) ... [2019-10-13 18:06:47,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7565aa79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:47, skipping insertion in model container [2019-10-13 18:06:47,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:47" (3/3) ... [2019-10-13 18:06:47,518 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label18.c [2019-10-13 18:06:47,530 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:47,544 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:47,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:47,602 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:47,602 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:47,602 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:47,602 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:47,602 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:47,603 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:47,603 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:47,603 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 18:06:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 18:06:47,663 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:47,664 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, 1, 1, 1] [2019-10-13 18:06:47,667 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 269272858, now seen corresponding path program 1 times [2019-10-13 18:06:47,681 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:47,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905260782] [2019-10-13 18:06:47,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:47,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:47,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:48,097 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 18:06:48,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905260782] [2019-10-13 18:06:48,099 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:48,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:48,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067937460] [2019-10-13 18:06:48,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:48,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:48,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:48,122 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-13 18:06:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:57,614 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-10-13 18:06:57,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:57,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 18:06:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:57,661 INFO L225 Difference]: With dead ends: 2984 [2019-10-13 18:06:57,661 INFO L226 Difference]: Without dead ends: 2142 [2019-10-13 18:06:57,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-13 18:06:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-10-13 18:06:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-10-13 18:06:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-10-13 18:06:57,840 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 63 [2019-10-13 18:06:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:57,841 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-10-13 18:06:57,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-10-13 18:06:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 18:06:57,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:57,849 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, 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] [2019-10-13 18:06:57,850 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1668142983, now seen corresponding path program 1 times [2019-10-13 18:06:57,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:57,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424500137] [2019-10-13 18:06:57,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:57,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:57,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:58,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424500137] [2019-10-13 18:06:58,188 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:58,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:06:58,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919625218] [2019-10-13 18:06:58,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:06:58,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:58,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:06:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:58,192 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-10-13 18:07:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:06,457 INFO L93 Difference]: Finished difference Result 6473 states and 11554 transitions. [2019-10-13 18:07:06,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:07:06,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-13 18:07:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:06,485 INFO L225 Difference]: With dead ends: 6473 [2019-10-13 18:07:06,485 INFO L226 Difference]: Without dead ends: 4347 [2019-10-13 18:07:06,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:07:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-10-13 18:07:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4301. [2019-10-13 18:07:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4301 states. [2019-10-13 18:07:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4301 states to 4301 states and 7377 transitions. [2019-10-13 18:07:06,706 INFO L78 Accepts]: Start accepts. Automaton has 4301 states and 7377 transitions. Word has length 152 [2019-10-13 18:07:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:06,707 INFO L462 AbstractCegarLoop]: Abstraction has 4301 states and 7377 transitions. [2019-10-13 18:07:06,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:07:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4301 states and 7377 transitions. [2019-10-13 18:07:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 18:07:06,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:06,712 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, 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 18:07:06,712 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1811597990, now seen corresponding path program 1 times [2019-10-13 18:07:06,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:06,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53632956] [2019-10-13 18:07:06,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:06,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:06,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:06,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53632956] [2019-10-13 18:07:06,990 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:07:06,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:07:06,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977563169] [2019-10-13 18:07:06,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:07:06,992 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:06,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:07:06,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:07:06,992 INFO L87 Difference]: Start difference. First operand 4301 states and 7377 transitions. Second operand 7 states. [2019-10-13 18:07:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:15,590 INFO L93 Difference]: Finished difference Result 13120 states and 22980 transitions. [2019-10-13 18:07:15,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:07:15,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2019-10-13 18:07:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:15,634 INFO L225 Difference]: With dead ends: 13120 [2019-10-13 18:07:15,634 INFO L226 Difference]: Without dead ends: 8825 [2019-10-13 18:07:15,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:07:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2019-10-13 18:07:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8723. [2019-10-13 18:07:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8723 states. [2019-10-13 18:07:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 13156 transitions. [2019-10-13 18:07:15,922 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 13156 transitions. Word has length 153 [2019-10-13 18:07:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:15,923 INFO L462 AbstractCegarLoop]: Abstraction has 8723 states and 13156 transitions. [2019-10-13 18:07:15,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:07:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 13156 transitions. [2019-10-13 18:07:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 18:07:15,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:15,932 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:07:15,933 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:15,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1951116309, now seen corresponding path program 1 times [2019-10-13 18:07:15,933 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:15,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658330871] [2019-10-13 18:07:15,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:15,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:15,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 112 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:07:16,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658330871] [2019-10-13 18:07:16,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683550118] [2019-10-13 18:07:16,270 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 18:07:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:16,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:07:16,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:07:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 18:07:16,636 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:07:16,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-13 18:07:16,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063925958] [2019-10-13 18:07:16,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:07:16,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:07:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:07:16,641 INFO L87 Difference]: Start difference. First operand 8723 states and 13156 transitions. Second operand 5 states.