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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:05:48,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:05:48,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:05:48,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:05:48,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:05:48,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:05:48,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:05:48,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:05:48,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:05:48,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:05:48,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:05:48,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:05:48,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:05:48,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:05:48,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:05:48,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:05:48,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:05:48,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:05:48,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:05:48,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:05:48,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:05:48,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:05:48,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:05:48,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:05:48,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:05:48,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:05:48,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:05:48,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:05:48,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:05:48,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:05:48,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:05:48,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:05:48,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:05:48,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:05:48,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:05:48,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:05:48,198 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 [2019-10-14 22:05:48,212 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:05:48,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:05:48,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:05:48,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:05:48,213 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:05:48,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:05:48,214 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:05:48,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:05:48,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:05:48,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:05:48,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:05:48,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:05:48,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:05:48,215 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:05:48,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:05:48,216 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:05:48,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:05:48,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:05:48,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:05:48,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:05:48,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:05:48,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:05:48,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:05:48,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:05:48,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:05:48,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:05:48,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:05:48,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:05:48,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:05:48,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:05:48,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:05:48,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:05:48,516 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:05:48,516 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:05:48,517 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-10-14 22:05:48,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74e356cc6/e8894e8fd9364160a400a7c491086884/FLAG8c6ddec00 [2019-10-14 22:05:49,285 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:05:49,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-10-14 22:05:49,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74e356cc6/e8894e8fd9364160a400a7c491086884/FLAG8c6ddec00 [2019-10-14 22:05:49,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74e356cc6/e8894e8fd9364160a400a7c491086884 [2019-10-14 22:05:49,442 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:05:49,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:05:49,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:49,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:05:49,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:05:49,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:49" (1/1) ... [2019-10-14 22:05:49,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a425a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:49, skipping insertion in model container [2019-10-14 22:05:49,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:49" (1/1) ... [2019-10-14 22:05:49,465 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:05:49,603 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:05:51,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:51,203 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:05:51,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:51,695 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:05:51,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51 WrapperNode [2019-10-14 22:05:51,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:51,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:05:51,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:05:51,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:05:51,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (1/1) ... [2019-10-14 22:05:51,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (1/1) ... [2019-10-14 22:05:51,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (1/1) ... [2019-10-14 22:05:51,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (1/1) ... [2019-10-14 22:05:51,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (1/1) ... [2019-10-14 22:05:51,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (1/1) ... [2019-10-14 22:05:51,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (1/1) ... [2019-10-14 22:05:51,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:05:51,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:05:51,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:05:51,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:05:51,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (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 [2019-10-14 22:05:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:05:51,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:05:51,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:05:51,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:05:51,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-14 22:05:52,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:05:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:05:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:05:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-14 22:05:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:05:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:05:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:05:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:05:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:05:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:05:55,650 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:05:55,651 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:05:55,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:55 BoogieIcfgContainer [2019-10-14 22:05:55,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:05:55,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:05:55,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:05:55,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:05:55,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:49" (1/3) ... [2019-10-14 22:05:55,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db50308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:55, skipping insertion in model container [2019-10-14 22:05:55,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:51" (2/3) ... [2019-10-14 22:05:55,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db50308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:55, skipping insertion in model container [2019-10-14 22:05:55,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:55" (3/3) ... [2019-10-14 22:05:55,663 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label25.c [2019-10-14 22:05:55,674 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:05:55,684 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:05:55,697 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:05:55,734 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:05:55,734 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:05:55,735 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:05:55,735 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:05:55,735 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:05:55,735 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:05:55,735 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:05:55,735 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:05:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-14 22:05:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 22:05:55,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:55,786 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] [2019-10-14 22:05:55,788 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:55,794 INFO L82 PathProgramCache]: Analyzing trace with hash 806765881, now seen corresponding path program 1 times [2019-10-14 22:05:55,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:55,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715564413] [2019-10-14 22:05:55,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:55,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:55,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:56,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715564413] [2019-10-14 22:05:56,329 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:56,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:05:56,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355080761] [2019-10-14 22:05:56,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:56,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:56,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:05:56,353 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-14 22:06:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:07,203 INFO L93 Difference]: Finished difference Result 3000 states and 5781 transitions. [2019-10-14 22:06:07,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:06:07,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-10-14 22:06:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:07,244 INFO L225 Difference]: With dead ends: 3000 [2019-10-14 22:06:07,244 INFO L226 Difference]: Without dead ends: 2142 [2019-10-14 22:06:07,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:06:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-14 22:06:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1428. [2019-10-14 22:06:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1428 states. [2019-10-14 22:06:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2262 transitions. [2019-10-14 22:06:07,430 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2262 transitions. Word has length 30 [2019-10-14 22:06:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:07,431 INFO L462 AbstractCegarLoop]: Abstraction has 1428 states and 2262 transitions. [2019-10-14 22:06:07,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:06:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2262 transitions. [2019-10-14 22:06:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 22:06:07,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:07,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:06:07,441 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash -597433259, now seen corresponding path program 1 times [2019-10-14 22:06:07,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:07,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097231945] [2019-10-14 22:06:07,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:07,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:07,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:07,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097231945] [2019-10-14 22:06:07,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:06:07,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:06:07,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101230876] [2019-10-14 22:06:07,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:06:07,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:06:07,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:06:07,803 INFO L87 Difference]: Start difference. First operand 1428 states and 2262 transitions. Second operand 8 states. [2019-10-14 22:06:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:19,023 INFO L93 Difference]: Finished difference Result 5784 states and 9265 transitions. [2019-10-14 22:06:19,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:06:19,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-10-14 22:06:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:19,047 INFO L225 Difference]: With dead ends: 5784 [2019-10-14 22:06:19,047 INFO L226 Difference]: Without dead ends: 4362 [2019-10-14 22:06:19,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:06:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2019-10-14 22:06:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 4345. [2019-10-14 22:06:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4345 states. [2019-10-14 22:06:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 5982 transitions. [2019-10-14 22:06:19,179 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 5982 transitions. Word has length 99 [2019-10-14 22:06:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:19,179 INFO L462 AbstractCegarLoop]: Abstraction has 4345 states and 5982 transitions. [2019-10-14 22:06:19,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:06:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 5982 transitions. [2019-10-14 22:06:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-14 22:06:19,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:19,185 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:06:19,185 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:19,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1953131942, now seen corresponding path program 1 times [2019-10-14 22:06:19,186 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:19,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392815442] [2019-10-14 22:06:19,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:19,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:19,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:06:19,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392815442] [2019-10-14 22:06:19,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579650840] [2019-10-14 22:06:19,573 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 [2019-10-14 22:06:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:19,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:06:19,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:06:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:19,927 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:06:19,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:06:19,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558911842] [2019-10-14 22:06:19,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:06:19,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:06:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:06:19,932 INFO L87 Difference]: Start difference. First operand 4345 states and 5982 transitions. Second operand 11 states.