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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:14,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:14,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:14,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:14,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:14,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:14,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:14,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:14,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:14,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:14,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:14,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:14,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:14,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:14,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:14,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:14,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:14,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:14,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:14,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:14,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:14,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:14,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:14,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:14,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:55:14,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:14,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:14,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:14,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:14,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:14,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:14,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:14,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:14,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:14,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:14,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:14,243 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 17:55:14,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:14,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:14,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:14,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:14,260 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:14,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:14,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:14,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:14,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:14,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:14,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:14,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:14,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:14,262 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:14,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:14,263 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:14,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:14,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:14,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:14,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:14,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:14,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:14,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:14,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:14,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:14,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:14,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:14,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:14,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:14,559 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:14,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:14,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:14,582 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:14,582 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:14,583 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-13 17:55:14,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f402d1d35/8142ffa0e6e247a7aff53d40863aa4d2/FLAGc756848fc [2019-10-13 17:55:15,308 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:15,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-13 17:55:15,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f402d1d35/8142ffa0e6e247a7aff53d40863aa4d2/FLAGc756848fc [2019-10-13 17:55:15,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f402d1d35/8142ffa0e6e247a7aff53d40863aa4d2 [2019-10-13 17:55:15,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:15,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:15,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:15,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:15,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:15,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:15" (1/1) ... [2019-10-13 17:55:15,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7278d8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:15, skipping insertion in model container [2019-10-13 17:55:15,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:15" (1/1) ... [2019-10-13 17:55:15,494 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:15,573 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:16,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:16,359 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:17,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:17,055 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:17,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17 WrapperNode [2019-10-13 17:55:17,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:17,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:17,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:17,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:17,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (1/1) ... [2019-10-13 17:55:17,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (1/1) ... [2019-10-13 17:55:17,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (1/1) ... [2019-10-13 17:55:17,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (1/1) ... [2019-10-13 17:55:17,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (1/1) ... [2019-10-13 17:55:17,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (1/1) ... [2019-10-13 17:55:17,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (1/1) ... [2019-10-13 17:55:17,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:17,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:17,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:17,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:17,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (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 17:55:17,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:17,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:17,339 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:17,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:19,462 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:19,463 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:19,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:19 BoogieIcfgContainer [2019-10-13 17:55:19,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:19,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:19,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:19,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:19,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:15" (1/3) ... [2019-10-13 17:55:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0d6fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:19, skipping insertion in model container [2019-10-13 17:55:19,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:17" (2/3) ... [2019-10-13 17:55:19,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0d6fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:19, skipping insertion in model container [2019-10-13 17:55:19,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:19" (3/3) ... [2019-10-13 17:55:19,489 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label08.c [2019-10-13 17:55:19,508 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:19,522 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:19,539 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:19,590 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:19,591 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:19,591 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:19,592 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:19,592 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:19,593 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:19,593 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:19,593 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 17:55:19,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:19,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:19,675 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:19,684 INFO L82 PathProgramCache]: Analyzing trace with hash -116190352, now seen corresponding path program 1 times [2019-10-13 17:55:19,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:19,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141922455] [2019-10-13 17:55:19,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:19,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:19,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:20,704 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:20,842 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 17:55:20,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141922455] [2019-10-13 17:55:20,844 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:20,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:20,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722471789] [2019-10-13 17:55:20,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:20,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:20,867 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:21,045 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:24,284 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-13 17:55:24,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:55:24,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2019-10-13 17:55:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:24,306 INFO L225 Difference]: With dead ends: 845 [2019-10-13 17:55:24,306 INFO L226 Difference]: Without dead ends: 470 [2019-10-13 17:55:24,315 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:55:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-13 17:55:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-13 17:55:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-13 17:55:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-13 17:55:24,406 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 163 [2019-10-13 17:55:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:24,407 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-13 17:55:24,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-13 17:55:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 17:55:24,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:24,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:24,417 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash 616853235, now seen corresponding path program 1 times [2019-10-13 17:55:24,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:24,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370869064] [2019-10-13 17:55:24,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:24,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:24,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:24,705 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:24,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370869064] [2019-10-13 17:55:24,892 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:24,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:24,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425753525] [2019-10-13 17:55:24,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:24,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:24,899 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-13 17:55:25,060 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:28,012 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:55:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:28,658 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-13 17:55:28,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:55:28,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 172 [2019-10-13 17:55:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:28,668 INFO L225 Difference]: With dead ends: 1407 [2019-10-13 17:55:28,668 INFO L226 Difference]: Without dead ends: 949 [2019-10-13 17:55:28,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:55:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-13 17:55:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-13 17:55:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-13 17:55:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-13 17:55:28,743 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 172 [2019-10-13 17:55:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:28,745 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-13 17:55:28,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-13 17:55:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 17:55:28,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:28,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:28,760 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545668, now seen corresponding path program 1 times [2019-10-13 17:55:28,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:28,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695748209] [2019-10-13 17:55:28,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:28,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:28,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,122 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:29,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695748209] [2019-10-13 17:55:29,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725760201] [2019-10-13 17:55:29,404 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 17:55:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:55:29,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:29,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:29,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-13 17:55:29,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053227927] [2019-10-13 17:55:29,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:29,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:29,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:29,798 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-13 17:55:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:31,455 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-13 17:55:31,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:31,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2019-10-13 17:55:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:31,472 INFO L225 Difference]: With dead ends: 2749 [2019-10-13 17:55:31,472 INFO L226 Difference]: Without dead ends: 1850 [2019-10-13 17:55:31,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-13 17:55:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-13 17:55:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-13 17:55:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2879 transitions. [2019-10-13 17:55:31,586 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2879 transitions. Word has length 175 [2019-10-13 17:55:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:31,587 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2879 transitions. [2019-10-13 17:55:31,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2879 transitions. [2019-10-13 17:55:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 17:55:31,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:31,599 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:31,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:31,805 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1022501435, now seen corresponding path program 1 times [2019-10-13 17:55:31,806 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:31,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510838826] [2019-10-13 17:55:31,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:31,807 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:31,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:32,033 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:32,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510838826] [2019-10-13 17:55:32,201 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:32,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:55:32,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51715974] [2019-10-13 17:55:32,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:55:32,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:55:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:32,203 INFO L87 Difference]: Start difference. First operand 1816 states and 2879 transitions. Second operand 9 states. [2019-10-13 17:55:32,343 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:33,064 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:36,288 INFO L93 Difference]: Finished difference Result 7017 states and 12004 transitions. [2019-10-13 17:55:36,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:55:36,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-10-13 17:55:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:36,328 INFO L225 Difference]: With dead ends: 7017 [2019-10-13 17:55:36,328 INFO L226 Difference]: Without dead ends: 5207 [2019-10-13 17:55:36,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:55:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2019-10-13 17:55:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 5139. [2019-10-13 17:55:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5139 states. [2019-10-13 17:55:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5139 states to 5139 states and 7981 transitions. [2019-10-13 17:55:36,556 INFO L78 Accepts]: Start accepts. Automaton has 5139 states and 7981 transitions. Word has length 176 [2019-10-13 17:55:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:36,557 INFO L462 AbstractCegarLoop]: Abstraction has 5139 states and 7981 transitions. [2019-10-13 17:55:36,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:55:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 5139 states and 7981 transitions. [2019-10-13 17:55:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 17:55:36,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:36,574 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:36,574 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1080229528, now seen corresponding path program 1 times [2019-10-13 17:55:36,575 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:36,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742748887] [2019-10-13 17:55:36,575 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:36,575 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:36,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,858 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:37,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742748887] [2019-10-13 17:55:37,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406958906] [2019-10-13 17:55:37,076 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 17:55:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:37,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:37,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:37,431 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:37,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:55:37,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046966486] [2019-10-13 17:55:37,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:37,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:37,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:55:37,434 INFO L87 Difference]: Start difference. First operand 5139 states and 7981 transitions. Second operand 3 states. [2019-10-13 17:55:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:38,640 INFO L93 Difference]: Finished difference Result 15237 states and 24333 transitions. [2019-10-13 17:55:38,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:38,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-13 17:55:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:38,709 INFO L225 Difference]: With dead ends: 15237 [2019-10-13 17:55:38,710 INFO L226 Difference]: Without dead ends: 10104 [2019-10-13 17:55:38,726 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:55:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10104 states. [2019-10-13 17:55:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10104 to 10102. [2019-10-13 17:55:39,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10102 states. [2019-10-13 17:55:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10102 states to 10102 states and 15469 transitions. [2019-10-13 17:55:39,101 INFO L78 Accepts]: Start accepts. Automaton has 10102 states and 15469 transitions. Word has length 177 [2019-10-13 17:55:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:39,104 INFO L462 AbstractCegarLoop]: Abstraction has 10102 states and 15469 transitions. [2019-10-13 17:55:39,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 10102 states and 15469 transitions. [2019-10-13 17:55:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-13 17:55:39,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:39,146 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:39,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:39,359 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1143772981, now seen corresponding path program 1 times [2019-10-13 17:55:39,360 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:39,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165863341] [2019-10-13 17:55:39,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:39,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:39,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,689 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:39,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165863341] [2019-10-13 17:55:39,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306353607] [2019-10-13 17:55:39,893 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 17:55:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:40,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:55:40,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:40,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:40,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-13 17:55:40,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636962624] [2019-10-13 17:55:40,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:40,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:40,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:40,245 INFO L87 Difference]: Start difference. First operand 10102 states and 15469 transitions. Second operand 3 states. [2019-10-13 17:55:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:41,463 INFO L93 Difference]: Finished difference Result 29302 states and 45756 transitions. [2019-10-13 17:55:41,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:41,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-10-13 17:55:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:41,563 INFO L225 Difference]: With dead ends: 29302 [2019-10-13 17:55:41,564 INFO L226 Difference]: Without dead ends: 19206 [2019-10-13 17:55:41,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19206 states. [2019-10-13 17:55:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19206 to 19153. [2019-10-13 17:55:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19153 states. [2019-10-13 17:55:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19153 states to 19153 states and 29191 transitions. [2019-10-13 17:55:42,272 INFO L78 Accepts]: Start accepts. Automaton has 19153 states and 29191 transitions. Word has length 184 [2019-10-13 17:55:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:42,272 INFO L462 AbstractCegarLoop]: Abstraction has 19153 states and 29191 transitions. [2019-10-13 17:55:42,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 19153 states and 29191 transitions. [2019-10-13 17:55:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-13 17:55:42,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:42,326 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:55:42,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:42,539 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 518791560, now seen corresponding path program 1 times [2019-10-13 17:55:42,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:42,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633436118] [2019-10-13 17:55:42,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:42,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:42,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,750 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:55:42,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633436118] [2019-10-13 17:55:42,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53116263] [2019-10-13 17:55:42,953 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 17:55:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:43,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:43,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:55:43,202 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:43,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:55:43,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025127713] [2019-10-13 17:55:43,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:43,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:43,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:43,204 INFO L87 Difference]: Start difference. First operand 19153 states and 29191 transitions. Second operand 3 states. [2019-10-13 17:55:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:44,741 INFO L93 Difference]: Finished difference Result 38304 states and 58394 transitions. [2019-10-13 17:55:44,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:44,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2019-10-13 17:55:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:44,824 INFO L225 Difference]: With dead ends: 38304 [2019-10-13 17:55:44,825 INFO L226 Difference]: Without dead ends: 19157 [2019-10-13 17:55:44,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19157 states. [2019-10-13 17:55:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19157 to 19153. [2019-10-13 17:55:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19153 states. [2019-10-13 17:55:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19153 states to 19153 states and 28551 transitions. [2019-10-13 17:55:45,423 INFO L78 Accepts]: Start accepts. Automaton has 19153 states and 28551 transitions. Word has length 201 [2019-10-13 17:55:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:45,423 INFO L462 AbstractCegarLoop]: Abstraction has 19153 states and 28551 transitions. [2019-10-13 17:55:45,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 19153 states and 28551 transitions. [2019-10-13 17:55:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 17:55:45,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:45,482 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:45,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:45,691 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:45,692 INFO L82 PathProgramCache]: Analyzing trace with hash -117913030, now seen corresponding path program 1 times [2019-10-13 17:55:45,692 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:45,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190816525] [2019-10-13 17:55:45,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:45,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:45,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:45,958 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:55:46,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190816525] [2019-10-13 17:55:46,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214748312] [2019-10-13 17:55:46,216 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 17:55:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:46,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:55:46,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:47,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:55:47,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-13 17:55:47,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957185280] [2019-10-13 17:55:47,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:55:47,240 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:47,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:55:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:47,240 INFO L87 Difference]: Start difference. First operand 19153 states and 28551 transitions. Second operand 9 states. [2019-10-13 17:55:47,540 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129