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/Problem14_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:34,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:34,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:34,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:34,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:34,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:34,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:34,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:34,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:34,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:34,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:34,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:34,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:34,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:34,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:34,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:34,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:34,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:34,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:34,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:34,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:34,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:34,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:34,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:34,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:34,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:34,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:34,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:34,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:34,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:34,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:34,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:34,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:34,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:34,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:34,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:34,877 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 18:02:34,895 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:34,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:34,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:34,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:34,897 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:34,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:34,897 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:34,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:34,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:34,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:34,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:34,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:34,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:34,898 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:34,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:34,899 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:34,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:34,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:34,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:34,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:34,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:34,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:34,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:34,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:34,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:34,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:34,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:34,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:34,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:35,171 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:35,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:35,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:35,195 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:35,195 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:35,196 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label19.c [2019-10-13 18:02:35,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a0dfd20f/b7d2642172dc44d096f4da9d94924dcd/FLAG0a4e924fe [2019-10-13 18:02:35,890 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:35,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label19.c [2019-10-13 18:02:35,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a0dfd20f/b7d2642172dc44d096f4da9d94924dcd/FLAG0a4e924fe [2019-10-13 18:02:36,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a0dfd20f/b7d2642172dc44d096f4da9d94924dcd [2019-10-13 18:02:36,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:36,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:36,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:36,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:36,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:36,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:36" (1/1) ... [2019-10-13 18:02:36,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191613fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:36, skipping insertion in model container [2019-10-13 18:02:36,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:36" (1/1) ... [2019-10-13 18:02:36,163 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:36,227 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:36,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:36,782 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:37,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:37,030 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:37,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37 WrapperNode [2019-10-13 18:02:37,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:37,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:37,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:37,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:37,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... [2019-10-13 18:02:37,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... [2019-10-13 18:02:37,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... [2019-10-13 18:02:37,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... [2019-10-13 18:02:37,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... [2019-10-13 18:02:37,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... [2019-10-13 18:02:37,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... [2019-10-13 18:02:37,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:37,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:37,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:37,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:37,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:37,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:37,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:37,335 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:37,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:37,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:37,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:39,021 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:39,024 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:39,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:39 BoogieIcfgContainer [2019-10-13 18:02:39,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:39,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:39,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:39,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:39,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:36" (1/3) ... [2019-10-13 18:02:39,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45323431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:39, skipping insertion in model container [2019-10-13 18:02:39,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:37" (2/3) ... [2019-10-13 18:02:39,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45323431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:39, skipping insertion in model container [2019-10-13 18:02:39,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:39" (3/3) ... [2019-10-13 18:02:39,048 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label19.c [2019-10-13 18:02:39,061 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:39,071 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:39,086 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:39,134 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:39,134 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:39,136 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:39,137 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:39,138 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:39,138 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:39,138 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:39,139 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 18:02:39,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:39,191 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, 1, 1, 1, 1, 1] [2019-10-13 18:02:39,193 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash -370104541, now seen corresponding path program 1 times [2019-10-13 18:02:39,211 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:39,211 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648795367] [2019-10-13 18:02:39,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:39,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:39,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,709 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 18:02:39,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648795367] [2019-10-13 18:02:39,712 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:39,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:39,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091718845] [2019-10-13 18:02:39,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:39,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:39,745 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:41,551 INFO L93 Difference]: Finished difference Result 698 states and 1241 transitions. [2019-10-13 18:02:41,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:02:41,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-10-13 18:02:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:41,582 INFO L225 Difference]: With dead ends: 698 [2019-10-13 18:02:41,582 INFO L226 Difference]: Without dead ends: 380 [2019-10-13 18:02:41,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:02:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-10-13 18:02:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 374. [2019-10-13 18:02:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2019-10-13 18:02:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 604 transitions. [2019-10-13 18:02:41,715 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 604 transitions. Word has length 68 [2019-10-13 18:02:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:41,716 INFO L462 AbstractCegarLoop]: Abstraction has 374 states and 604 transitions. [2019-10-13 18:02:41,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 604 transitions. [2019-10-13 18:02:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 18:02:41,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:41,738 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:41,739 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash -115709203, now seen corresponding path program 1 times [2019-10-13 18:02:41,740 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:41,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260245787] [2019-10-13 18:02:41,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:41,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:41,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:42,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260245787] [2019-10-13 18:02:42,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:42,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:42,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005638668] [2019-10-13 18:02:42,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:42,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:42,103 INFO L87 Difference]: Start difference. First operand 374 states and 604 transitions. Second operand 9 states. [2019-10-13 18:02:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:44,752 INFO L93 Difference]: Finished difference Result 1132 states and 1853 transitions. [2019-10-13 18:02:44,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:44,758 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-10-13 18:02:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:44,767 INFO L225 Difference]: With dead ends: 1132 [2019-10-13 18:02:44,767 INFO L226 Difference]: Without dead ends: 764 [2019-10-13 18:02:44,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2019-10-13 18:02:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 750. [2019-10-13 18:02:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-13 18:02:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1117 transitions. [2019-10-13 18:02:44,834 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1117 transitions. Word has length 137 [2019-10-13 18:02:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:44,835 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1117 transitions. [2019-10-13 18:02:44,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1117 transitions. [2019-10-13 18:02:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 18:02:44,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:44,838 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:44,838 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:44,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1811598022, now seen corresponding path program 1 times [2019-10-13 18:02:44,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:44,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036880551] [2019-10-13 18:02:44,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:44,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:44,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:45,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036880551] [2019-10-13 18:02:45,013 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:45,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:45,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370021012] [2019-10-13 18:02:45,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:45,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:45,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:45,016 INFO L87 Difference]: Start difference. First operand 750 states and 1117 transitions. Second operand 8 states. [2019-10-13 18:02:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:46,792 INFO L93 Difference]: Finished difference Result 2286 states and 3549 transitions. [2019-10-13 18:02:46,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:02:46,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2019-10-13 18:02:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:46,809 INFO L225 Difference]: With dead ends: 2286 [2019-10-13 18:02:46,810 INFO L226 Difference]: Without dead ends: 1542 [2019-10-13 18:02:46,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:02:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-13 18:02:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1514. [2019-10-13 18:02:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-10-13 18:02:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2144 transitions. [2019-10-13 18:02:46,895 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2144 transitions. Word has length 138 [2019-10-13 18:02:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:46,897 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 2144 transitions. [2019-10-13 18:02:46,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2144 transitions. [2019-10-13 18:02:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 18:02:46,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:46,901 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, 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] [2019-10-13 18:02:46,901 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1374708642, now seen corresponding path program 1 times [2019-10-13 18:02:46,902 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:46,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956394103] [2019-10-13 18:02:46,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:47,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956394103] [2019-10-13 18:02:47,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:47,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:47,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465562320] [2019-10-13 18:02:47,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:47,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:47,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:47,113 INFO L87 Difference]: Start difference. First operand 1514 states and 2144 transitions. Second operand 8 states. [2019-10-13 18:02:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:49,125 INFO L93 Difference]: Finished difference Result 3904 states and 6013 transitions. [2019-10-13 18:02:49,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:49,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2019-10-13 18:02:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:49,145 INFO L225 Difference]: With dead ends: 3904 [2019-10-13 18:02:49,145 INFO L226 Difference]: Without dead ends: 2396 [2019-10-13 18:02:49,150 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2019-10-13 18:02:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2092. [2019-10-13 18:02:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2019-10-13 18:02:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2854 transitions. [2019-10-13 18:02:49,246 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2854 transitions. Word has length 140 [2019-10-13 18:02:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:49,247 INFO L462 AbstractCegarLoop]: Abstraction has 2092 states and 2854 transitions. [2019-10-13 18:02:49,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2854 transitions. [2019-10-13 18:02:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 18:02:49,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:49,249 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, 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] [2019-10-13 18:02:49,250 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:49,250 INFO L82 PathProgramCache]: Analyzing trace with hash 673073701, now seen corresponding path program 1 times [2019-10-13 18:02:49,250 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:49,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954326706] [2019-10-13 18:02:49,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:49,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:49,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:49,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954326706] [2019-10-13 18:02:49,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570989614] [2019-10-13 18:02:49,451 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 18:02:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:49,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:49,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:49,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-10-13 18:02:49,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543848648] [2019-10-13 18:02:49,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:49,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:49,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:49,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:49,649 INFO L87 Difference]: Start difference. First operand 2092 states and 2854 transitions. Second operand 3 states. [2019-10-13 18:02:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:50,487 INFO L93 Difference]: Finished difference Result 5100 states and 6950 transitions. [2019-10-13 18:02:50,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:50,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-10-13 18:02:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:50,503 INFO L225 Difference]: With dead ends: 5100 [2019-10-13 18:02:50,503 INFO L226 Difference]: Without dead ends: 3196 [2019-10-13 18:02:50,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2019-10-13 18:02:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2456. [2019-10-13 18:02:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-10-13 18:02:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3242 transitions. [2019-10-13 18:02:50,586 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3242 transitions. Word has length 141 [2019-10-13 18:02:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:50,587 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3242 transitions. [2019-10-13 18:02:50,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3242 transitions. [2019-10-13 18:02:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 18:02:50,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:50,590 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, 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 18:02:50,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:50,795 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 976683481, now seen corresponding path program 1 times [2019-10-13 18:02:50,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:50,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354160239] [2019-10-13 18:02:50,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:50,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:50,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:50,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354160239] [2019-10-13 18:02:50,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885154457] [2019-10-13 18:02:50,973 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 18:02:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:51,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:51,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:51,137 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:51,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:51,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24773082] [2019-10-13 18:02:51,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:51,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:51,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:51,150 INFO L87 Difference]: Start difference. First operand 2456 states and 3242 transitions. Second operand 3 states. [2019-10-13 18:02:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:52,020 INFO L93 Difference]: Finished difference Result 3012 states and 4021 transitions. [2019-10-13 18:02:52,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:52,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2019-10-13 18:02:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:52,036 INFO L225 Difference]: With dead ends: 3012 [2019-10-13 18:02:52,036 INFO L226 Difference]: Without dead ends: 3010 [2019-10-13 18:02:52,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2019-10-13 18:02:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2092. [2019-10-13 18:02:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2019-10-13 18:02:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2761 transitions. [2019-10-13 18:02:52,109 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2761 transitions. Word has length 163 [2019-10-13 18:02:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:52,110 INFO L462 AbstractCegarLoop]: Abstraction has 2092 states and 2761 transitions. [2019-10-13 18:02:52,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2761 transitions. [2019-10-13 18:02:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-10-13 18:02:52,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:52,118 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:52,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:52,323 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash -752342163, now seen corresponding path program 1 times [2019-10-13 18:02:52,323 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:52,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009078862] [2019-10-13 18:02:52,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:52,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:52,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-13 18:02:52,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009078862] [2019-10-13 18:02:52,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878850512] [2019-10-13 18:02:52,796 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 18:02:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:52,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:52,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:52,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-13 18:02:53,075 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:53,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-13 18:02:53,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301335488] [2019-10-13 18:02:53,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:53,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:53,078 INFO L87 Difference]: Start difference. First operand 2092 states and 2761 transitions. Second operand 5 states. [2019-10-13 18:02:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:54,382 INFO L93 Difference]: Finished difference Result 4758 states and 6206 transitions. [2019-10-13 18:02:54,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:54,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2019-10-13 18:02:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:54,400 INFO L225 Difference]: With dead ends: 4758 [2019-10-13 18:02:54,400 INFO L226 Difference]: Without dead ends: 2486 [2019-10-13 18:02:54,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:02:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2019-10-13 18:02:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2456. [2019-10-13 18:02:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-10-13 18:02:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3124 transitions. [2019-10-13 18:02:54,509 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3124 transitions. Word has length 254 [2019-10-13 18:02:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:54,509 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3124 transitions. [2019-10-13 18:02:54,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3124 transitions. [2019-10-13 18:02:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-13 18:02:54,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:54,520 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:02:54,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:54,725 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2043516500, now seen corresponding path program 1 times [2019-10-13 18:02:54,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:54,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981974700] [2019-10-13 18:02:54,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:54,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:54,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 193 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:55,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981974700] [2019-10-13 18:02:55,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447324904] [2019-10-13 18:02:55,834 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 18:02:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:55,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:56,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-13 18:02:56,301 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:56,301 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:56,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521679706] [2019-10-13 18:02:56,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:56,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:56,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:56,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:56,303 INFO L87 Difference]: Start difference. First operand 2456 states and 3124 transitions. Second operand 16 states. [2019-10-13 18:03:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:00,382 INFO L93 Difference]: Finished difference Result 4868 states and 6266 transitions. [2019-10-13 18:03:00,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 18:03:00,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 338 [2019-10-13 18:03:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:00,398 INFO L225 Difference]: With dead ends: 4868 [2019-10-13 18:03:00,399 INFO L226 Difference]: Without dead ends: 2731 [2019-10-13 18:03:00,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 18:03:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2019-10-13 18:03:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 2638. [2019-10-13 18:03:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2638 states. [2019-10-13 18:03:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3089 transitions. [2019-10-13 18:03:00,525 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3089 transitions. Word has length 338 [2019-10-13 18:03:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:00,526 INFO L462 AbstractCegarLoop]: Abstraction has 2638 states and 3089 transitions. [2019-10-13 18:03:00,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3089 transitions. [2019-10-13 18:03:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2019-10-13 18:03:00,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:00,539 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:00,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:00,754 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:00,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:00,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1792761524, now seen corresponding path program 1 times [2019-10-13 18:03:00,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:00,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573503720] [2019-10-13 18:03:00,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:00,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:00,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 470 proven. 73 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 18:03:01,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573503720] [2019-10-13 18:03:01,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132187600] [2019-10-13 18:03:01,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:01,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 624 proven. 2 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-13 18:03:01,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:01,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:01,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123642333] [2019-10-13 18:03:01,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:01,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:01,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:01,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:01,971 INFO L87 Difference]: Start difference. First operand 2638 states and 3089 transitions. Second operand 9 states. [2019-10-13 18:03:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:04,172 INFO L93 Difference]: Finished difference Result 6016 states and 7208 transitions. [2019-10-13 18:03:04,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:03:04,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 473 [2019-10-13 18:03:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:04,185 INFO L225 Difference]: With dead ends: 6016 [2019-10-13 18:03:04,185 INFO L226 Difference]: Without dead ends: 3380 [2019-10-13 18:03:04,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 486 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2019-10-13 18:03:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 3378. [2019-10-13 18:03:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3378 states. [2019-10-13 18:03:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 3956 transitions. [2019-10-13 18:03:04,267 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 3956 transitions. Word has length 473 [2019-10-13 18:03:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:04,268 INFO L462 AbstractCegarLoop]: Abstraction has 3378 states and 3956 transitions. [2019-10-13 18:03:04,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 3956 transitions. [2019-10-13 18:03:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2019-10-13 18:03:04,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:04,286 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:04,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:04,495 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:04,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:04,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1046718491, now seen corresponding path program 1 times [2019-10-13 18:03:04,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:04,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415768955] [2019-10-13 18:03:04,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:04,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:04,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 623 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-13 18:03:05,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415768955] [2019-10-13 18:03:05,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191250489] [2019-10-13 18:03:05,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:06,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:06,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 846 proven. 2 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-10-13 18:03:06,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:06,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:06,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781250442] [2019-10-13 18:03:06,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:06,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:06,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:06,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:06,863 INFO L87 Difference]: Start difference. First operand 3378 states and 3956 transitions. Second operand 12 states. [2019-10-13 18:03:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:08,953 INFO L93 Difference]: Finished difference Result 6496 states and 7691 transitions. [2019-10-13 18:03:08,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:08,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 557 [2019-10-13 18:03:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:08,969 INFO L225 Difference]: With dead ends: 6496 [2019-10-13 18:03:08,970 INFO L226 Difference]: Without dead ends: 3451 [2019-10-13 18:03:08,976 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 576 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2019-10-13 18:03:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3376. [2019-10-13 18:03:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3376 states. [2019-10-13 18:03:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 3812 transitions. [2019-10-13 18:03:09,047 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 3812 transitions. Word has length 557 [2019-10-13 18:03:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:09,047 INFO L462 AbstractCegarLoop]: Abstraction has 3376 states and 3812 transitions. [2019-10-13 18:03:09,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 3812 transitions. [2019-10-13 18:03:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2019-10-13 18:03:09,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:09,065 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:09,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:09,277 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:09,278 INFO L82 PathProgramCache]: Analyzing trace with hash 921106823, now seen corresponding path program 2 times [2019-10-13 18:03:09,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:09,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112370008] [2019-10-13 18:03:09,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:09,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:09,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 846 proven. 162 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-13 18:03:10,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112370008] [2019-10-13 18:03:10,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721169424] [2019-10-13 18:03:10,402 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:10,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:03:10,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:03:10,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:10,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:10,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 872 proven. 2 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 18:03:10,899 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:10,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:10,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40190994] [2019-10-13 18:03:10,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:10,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:10,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:10,902 INFO L87 Difference]: Start difference. First operand 3376 states and 3812 transitions. Second operand 17 states.