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/Problem03_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:39,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:39,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:39,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:39,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:39,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:39,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:39,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:39,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:39,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:39,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:39,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:39,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:39,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:39,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:39,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:39,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:39,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:39,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:39,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:39,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:39,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:39,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:39,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:39,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:39,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:39,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:39,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:39,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:39,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:39,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:39,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:39,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:39,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:39,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:39,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:39,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:54:39,266 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:39,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:39,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:39,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:39,268 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:39,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:39,272 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:39,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:39,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:39,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:39,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:39,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:39,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:39,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:39,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:39,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:39,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:39,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:39,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:39,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:39,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:39,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:39,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:39,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:39,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:39,572 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:39,572 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:39,573 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-14 21:54:39,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bea1ae32/46cd7de7336c481fb9c08bd265d4cc14/FLAG2e4c8822f [2019-10-14 21:54:40,330 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:40,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-14 21:54:40,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bea1ae32/46cd7de7336c481fb9c08bd265d4cc14/FLAG2e4c8822f [2019-10-14 21:54:40,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bea1ae32/46cd7de7336c481fb9c08bd265d4cc14 [2019-10-14 21:54:40,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:40,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:40,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:40,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:40,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:40,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:40" (1/1) ... [2019-10-14 21:54:40,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516cae5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:40, skipping insertion in model container [2019-10-14 21:54:40,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:40" (1/1) ... [2019-10-14 21:54:40,594 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:40,682 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:41,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:41,443 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:41,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:41,712 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:41,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41 WrapperNode [2019-10-14 21:54:41,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:41,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:41,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:41,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:41,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (1/1) ... [2019-10-14 21:54:41,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (1/1) ... [2019-10-14 21:54:41,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (1/1) ... [2019-10-14 21:54:41,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (1/1) ... [2019-10-14 21:54:41,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (1/1) ... [2019-10-14 21:54:41,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (1/1) ... [2019-10-14 21:54:41,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (1/1) ... [2019-10-14 21:54:41,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:41,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:41,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:41,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:41,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (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 21:54:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:43,894 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:43,894 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:43,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:43 BoogieIcfgContainer [2019-10-14 21:54:43,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:43,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:43,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:43,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:43,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:40" (1/3) ... [2019-10-14 21:54:43,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7b17c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:43, skipping insertion in model container [2019-10-14 21:54:43,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:41" (2/3) ... [2019-10-14 21:54:43,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7b17c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:43, skipping insertion in model container [2019-10-14 21:54:43,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:43" (3/3) ... [2019-10-14 21:54:43,906 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2019-10-14 21:54:43,918 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:43,928 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:43,941 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:43,979 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:43,979 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:43,980 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:43,980 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:43,980 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:43,980 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:43,980 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:43,980 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 21:54:44,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:44,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:44,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:44,043 INFO L82 PathProgramCache]: Analyzing trace with hash -986634456, now seen corresponding path program 1 times [2019-10-14 21:54:44,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:44,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617751926] [2019-10-14 21:54:44,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:44,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:44,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:45,061 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:45,164 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 21:54:45,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617751926] [2019-10-14 21:54:45,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:45,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:45,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858786591] [2019-10-14 21:54:45,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:45,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:45,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:45,189 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:45,429 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:45,927 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:49,439 INFO L93 Difference]: Finished difference Result 1121 states and 2001 transitions. [2019-10-14 21:54:49,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:49,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-10-14 21:54:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:49,464 INFO L225 Difference]: With dead ends: 1121 [2019-10-14 21:54:49,464 INFO L226 Difference]: Without dead ends: 712 [2019-10-14 21:54:49,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-10-14 21:54:49,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 469. [2019-10-14 21:54:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-14 21:54:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 753 transitions. [2019-10-14 21:54:49,571 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 753 transitions. Word has length 153 [2019-10-14 21:54:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:49,572 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 753 transitions. [2019-10-14 21:54:49,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 753 transitions. [2019-10-14 21:54:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 21:54:49,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:49,578 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:49,578 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1704163947, now seen corresponding path program 1 times [2019-10-14 21:54:49,579 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:49,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90478632] [2019-10-14 21:54:49,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:49,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:49,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:49,910 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:50,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90478632] [2019-10-14 21:54:50,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:50,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:50,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202520335] [2019-10-14 21:54:50,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:50,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:50,106 INFO L87 Difference]: Start difference. First operand 469 states and 753 transitions. Second operand 8 states. [2019-10-14 21:54:50,248 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:53,027 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:54:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:53,621 INFO L93 Difference]: Finished difference Result 1416 states and 2361 transitions. [2019-10-14 21:54:53,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:54:53,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 162 [2019-10-14 21:54:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:53,631 INFO L225 Difference]: With dead ends: 1416 [2019-10-14 21:54:53,632 INFO L226 Difference]: Without dead ends: 953 [2019-10-14 21:54:53,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:54:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-10-14 21:54:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 908. [2019-10-14 21:54:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-10-14 21:54:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1448 transitions. [2019-10-14 21:54:53,695 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1448 transitions. Word has length 162 [2019-10-14 21:54:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:53,695 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1448 transitions. [2019-10-14 21:54:53,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1448 transitions. [2019-10-14 21:54:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 21:54:53,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:53,700 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:53,700 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash 198136689, now seen corresponding path program 1 times [2019-10-14 21:54:53,701 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:53,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286652192] [2019-10-14 21:54:53,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,929 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:54,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286652192] [2019-10-14 21:54:54,117 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:54,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:54,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494626133] [2019-10-14 21:54:54,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:54,128 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:54,130 INFO L87 Difference]: Start difference. First operand 908 states and 1448 transitions. Second operand 8 states. [2019-10-14 21:54:54,270 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:54,619 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:54,995 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:58,895 INFO L93 Difference]: Finished difference Result 3571 states and 5951 transitions. [2019-10-14 21:54:58,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:54:58,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 163 [2019-10-14 21:54:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:58,913 INFO L225 Difference]: With dead ends: 3571 [2019-10-14 21:54:58,913 INFO L226 Difference]: Without dead ends: 2669 [2019-10-14 21:54:58,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:54:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2019-10-14 21:54:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2636. [2019-10-14 21:54:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-10-14 21:54:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4002 transitions. [2019-10-14 21:54:59,032 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4002 transitions. Word has length 163 [2019-10-14 21:54:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:59,032 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 4002 transitions. [2019-10-14 21:54:59,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4002 transitions. [2019-10-14 21:54:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 21:54:59,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:59,040 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:59,040 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1802668228, now seen corresponding path program 1 times [2019-10-14 21:54:59,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:59,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332328557] [2019-10-14 21:54:59,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:59,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:59,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,358 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:59,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332328557] [2019-10-14 21:54:59,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921818527] [2019-10-14 21:54:59,592 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 21:54:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:59,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:00,047 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:00,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-14 21:55:00,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399459650] [2019-10-14 21:55:00,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:00,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:00,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:00,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:00,050 INFO L87 Difference]: Start difference. First operand 2636 states and 4002 transitions. Second operand 3 states. [2019-10-14 21:55:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:01,304 INFO L93 Difference]: Finished difference Result 7809 states and 12187 transitions. [2019-10-14 21:55:01,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:01,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-10-14 21:55:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:01,331 INFO L225 Difference]: With dead ends: 7809 [2019-10-14 21:55:01,332 INFO L226 Difference]: Without dead ends: 5179 [2019-10-14 21:55:01,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2019-10-14 21:55:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5176. [2019-10-14 21:55:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5176 states. [2019-10-14 21:55:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 7196 transitions. [2019-10-14 21:55:01,509 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 7196 transitions. Word has length 165 [2019-10-14 21:55:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:01,509 INFO L462 AbstractCegarLoop]: Abstraction has 5176 states and 7196 transitions. [2019-10-14 21:55:01,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 7196 transitions. [2019-10-14 21:55:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 21:55:01,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:01,522 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:01,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:01,727 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash -531391768, now seen corresponding path program 1 times [2019-10-14 21:55:01,728 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:01,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136522173] [2019-10-14 21:55:01,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:01,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:01,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:01,968 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:02,098 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:02,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136522173] [2019-10-14 21:55:02,257 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:02,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:02,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680156276] [2019-10-14 21:55:02,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:02,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:02,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:02,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:02,259 INFO L87 Difference]: Start difference. First operand 5176 states and 7196 transitions. Second operand 9 states. [2019-10-14 21:55:02,494 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:05,862 INFO L93 Difference]: Finished difference Result 15753 states and 24222 transitions. [2019-10-14 21:55:05,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:55:05,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 171 [2019-10-14 21:55:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:05,947 INFO L225 Difference]: With dead ends: 15753 [2019-10-14 21:55:05,948 INFO L226 Difference]: Without dead ends: 10583 [2019-10-14 21:55:05,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:55:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10583 states. [2019-10-14 21:55:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10583 to 10365. [2019-10-14 21:55:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10365 states. [2019-10-14 21:55:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 14901 transitions. [2019-10-14 21:55:06,564 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 14901 transitions. Word has length 171 [2019-10-14 21:55:06,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:06,564 INFO L462 AbstractCegarLoop]: Abstraction has 10365 states and 14901 transitions. [2019-10-14 21:55:06,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 14901 transitions. [2019-10-14 21:55:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 21:55:06,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:06,595 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:06,599 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:06,600 INFO L82 PathProgramCache]: Analyzing trace with hash -15837281, now seen corresponding path program 1 times [2019-10-14 21:55:06,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:06,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238247972] [2019-10-14 21:55:06,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:06,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:06,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:06,789 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:06,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238247972] [2019-10-14 21:55:06,975 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:06,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:06,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866783470] [2019-10-14 21:55:06,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:06,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:06,977 INFO L87 Difference]: Start difference. First operand 10365 states and 14901 transitions. Second operand 9 states. [2019-10-14 21:55:07,129 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:07,789 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:08,262 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:12,242 INFO L93 Difference]: Finished difference Result 39612 states and 60962 transitions. [2019-10-14 21:55:12,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:55:12,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 172 [2019-10-14 21:55:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:12,384 INFO L225 Difference]: With dead ends: 39612 [2019-10-14 21:55:12,384 INFO L226 Difference]: Without dead ends: 29253 [2019-10-14 21:55:12,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:55:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29253 states. [2019-10-14 21:55:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29253 to 29043. [2019-10-14 21:55:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29043 states. [2019-10-14 21:55:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29043 states to 29043 states and 40280 transitions. [2019-10-14 21:55:13,585 INFO L78 Accepts]: Start accepts. Automaton has 29043 states and 40280 transitions. Word has length 172 [2019-10-14 21:55:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:13,585 INFO L462 AbstractCegarLoop]: Abstraction has 29043 states and 40280 transitions. [2019-10-14 21:55:13,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 29043 states and 40280 transitions.