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/Problem16_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:52,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:52,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:52,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:52,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:52,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:52,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:52,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:52,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:52,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:52,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:52,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:52,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:52,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:52,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:52,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:52,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:52,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:52,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:52,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:52,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:52,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:52,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:52,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:52,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:52,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:52,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:52,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:52,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:52,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:52,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:52,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:52,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:52,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:52,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:52,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:52,236 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 18:04:52,255 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:52,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:52,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:52,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:52,257 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:52,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:52,257 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:52,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:52,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:52,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:52,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:52,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:52,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:52,259 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:52,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:52,259 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:52,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:52,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:52,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:52,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:52,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:52,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:52,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:52,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:52,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:52,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:52,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:52,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:52,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:52,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:52,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:52,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:52,567 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:52,568 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:52,569 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label12.c [2019-10-13 18:04:52,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b59ba321/304cd588f62645cda7fb653fc7202a5c/FLAG3eef229d7 [2019-10-13 18:04:53,332 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:53,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label12.c [2019-10-13 18:04:53,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b59ba321/304cd588f62645cda7fb653fc7202a5c/FLAG3eef229d7 [2019-10-13 18:04:53,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b59ba321/304cd588f62645cda7fb653fc7202a5c [2019-10-13 18:04:53,520 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:53,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:53,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:53,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:53,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:53,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:53" (1/1) ... [2019-10-13 18:04:53,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a8eca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:53, skipping insertion in model container [2019-10-13 18:04:53,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:53" (1/1) ... [2019-10-13 18:04:53,540 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:53,623 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:54,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:54,705 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:54,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:54,958 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:54,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54 WrapperNode [2019-10-13 18:04:54,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:54,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:54,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:54,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:54,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (1/1) ... [2019-10-13 18:04:54,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (1/1) ... [2019-10-13 18:04:55,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (1/1) ... [2019-10-13 18:04:55,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (1/1) ... [2019-10-13 18:04:55,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (1/1) ... [2019-10-13 18:04:55,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (1/1) ... [2019-10-13 18:04:55,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (1/1) ... [2019-10-13 18:04:55,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:55,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:55,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:55,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:55,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (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 18:04:55,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:57,620 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:57,620 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:57,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:57 BoogieIcfgContainer [2019-10-13 18:04:57,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:57,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:57,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:57,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:57,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:53" (1/3) ... [2019-10-13 18:04:57,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b906ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:57, skipping insertion in model container [2019-10-13 18:04:57,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:54" (2/3) ... [2019-10-13 18:04:57,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b906ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:57, skipping insertion in model container [2019-10-13 18:04:57,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:57" (3/3) ... [2019-10-13 18:04:57,641 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label12.c [2019-10-13 18:04:57,654 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:57,665 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:57,678 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:57,721 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:57,722 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:57,722 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:57,722 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:57,723 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:57,723 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:57,723 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:57,723 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:04:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 18:04:57,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:57,774 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] [2019-10-13 18:04:57,777 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1524372618, now seen corresponding path program 1 times [2019-10-13 18:04:57,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:57,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617141853] [2019-10-13 18:04:57,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:57,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:57,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:58,210 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 18:04:58,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617141853] [2019-10-13 18:04:58,212 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:58,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:58,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446936544] [2019-10-13 18:04:58,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:58,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:58,237 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:03,404 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-13 18:05:03,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:03,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-10-13 18:05:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:03,434 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:03,434 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:03,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 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 18:05:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:03,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-13 18:05:03,589 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 45 [2019-10-13 18:05:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:03,591 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-13 18:05:03,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-13 18:05:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 18:05:03,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:03,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:03,604 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 539466811, now seen corresponding path program 1 times [2019-10-13 18:05:03,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:03,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856991327] [2019-10-13 18:05:03,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:03,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:03,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:04,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856991327] [2019-10-13 18:05:04,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:04,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:04,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654399117] [2019-10-13 18:05:04,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:04,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:04,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:04,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:04,076 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-13 18:05:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:08,462 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-10-13 18:05:08,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:08,462 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 180 [2019-10-13 18:05:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:08,478 INFO L225 Difference]: With dead ends: 3125 [2019-10-13 18:05:08,478 INFO L226 Difference]: Without dead ends: 2100 [2019-10-13 18:05:08,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-13 18:05:08,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-10-13 18:05:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-10-13 18:05:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-10-13 18:05:08,559 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 180 [2019-10-13 18:05:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:08,560 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-10-13 18:05:08,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-10-13 18:05:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-13 18:05:08,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:08,566 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:08,566 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash -893478362, now seen corresponding path program 1 times [2019-10-13 18:05:08,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:08,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374634267] [2019-10-13 18:05:08,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:08,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:08,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:08,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374634267] [2019-10-13 18:05:08,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825642894] [2019-10-13 18:05:08,890 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 18:05:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:09,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:09,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 18:05:09,153 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:09,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:09,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243106410] [2019-10-13 18:05:09,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:09,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:09,165 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-10-13 18:05:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:12,096 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-10-13 18:05:12,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:12,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2019-10-13 18:05:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:12,118 INFO L225 Difference]: With dead ends: 5192 [2019-10-13 18:05:12,118 INFO L226 Difference]: Without dead ends: 3129 [2019-10-13 18:05:12,124 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-10-13 18:05:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-10-13 18:05:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-10-13 18:05:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-10-13 18:05:12,230 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 215 [2019-10-13 18:05:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:12,232 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-10-13 18:05:12,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-10-13 18:05:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-10-13 18:05:12,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:12,240 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:12,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:12,453 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:12,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:12,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1369835779, now seen corresponding path program 1 times [2019-10-13 18:05:12,454 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:12,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058778744] [2019-10-13 18:05:12,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:12,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:12,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 187 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:05:12,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058778744] [2019-10-13 18:05:12,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307629653] [2019-10-13 18:05:12,828 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 18:05:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:12,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:12,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 308 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 18:05:13,040 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:13,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:13,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432749897] [2019-10-13 18:05:13,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:13,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:13,042 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-10-13 18:05:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:21,566 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-10-13 18:05:21,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 18:05:21,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 324 [2019-10-13 18:05:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:21,610 INFO L225 Difference]: With dead ends: 10419 [2019-10-13 18:05:21,610 INFO L226 Difference]: Without dead ends: 6317 [2019-10-13 18:05:21,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:05:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-10-13 18:05:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5938. [2019-10-13 18:05:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5938 states. [2019-10-13 18:05:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 7569 transitions. [2019-10-13 18:05:21,832 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 7569 transitions. Word has length 324 [2019-10-13 18:05:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:21,886 INFO L462 AbstractCegarLoop]: Abstraction has 5938 states and 7569 transitions. [2019-10-13 18:05:21,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 7569 transitions. [2019-10-13 18:05:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2019-10-13 18:05:21,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:21,895 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:22,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:22,100 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:22,101 INFO L82 PathProgramCache]: Analyzing trace with hash 556704298, now seen corresponding path program 1 times [2019-10-13 18:05:22,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:22,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2560545] [2019-10-13 18:05:22,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:22,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:22,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 195 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 18:05:22,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2560545] [2019-10-13 18:05:22,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077822711] [2019-10-13 18:05:22,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:22,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 330 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 18:05:22,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:22,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:05:22,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830931480] [2019-10-13 18:05:22,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:22,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:22,845 INFO L87 Difference]: Start difference. First operand 5938 states and 7569 transitions. Second operand 11 states. [2019-10-13 18:05:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:27,933 INFO L93 Difference]: Finished difference Result 13329 states and 17713 transitions. [2019-10-13 18:05:27,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:27,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 361 [2019-10-13 18:05:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:27,972 INFO L225 Difference]: With dead ends: 13329 [2019-10-13 18:05:27,973 INFO L226 Difference]: Without dead ends: 7352 [2019-10-13 18:05:28,000 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 368 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:05:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2019-10-13 18:05:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 7310. [2019-10-13 18:05:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7310 states. [2019-10-13 18:05:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 8304 transitions. [2019-10-13 18:05:28,217 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 8304 transitions. Word has length 361 [2019-10-13 18:05:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:28,217 INFO L462 AbstractCegarLoop]: Abstraction has 7310 states and 8304 transitions. [2019-10-13 18:05:28,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 8304 transitions. [2019-10-13 18:05:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2019-10-13 18:05:28,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:28,237 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-10-13 18:05:28,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:28,442 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1122615386, now seen corresponding path program 1 times [2019-10-13 18:05:28,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:28,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097829578] [2019-10-13 18:05:28,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:28,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:28,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 257 proven. 240 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-10-13 18:05:29,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097829578] [2019-10-13 18:05:29,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486858276] [2019-10-13 18:05:29,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:29,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:29,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 673 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-13 18:05:29,796 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:29,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:29,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127512884] [2019-10-13 18:05:29,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:29,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:29,799 INFO L87 Difference]: Start difference. First operand 7310 states and 8304 transitions. Second operand 12 states.