/usr/bin/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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:01:39,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:01:39,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:01:39,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:01:39,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:01:39,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:01:39,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:01:39,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:01:39,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:01:39,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:01:39,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:01:39,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:01:39,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:01:39,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:01:39,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:01:39,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:01:39,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:01:39,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:01:39,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:01:39,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:01:39,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:01:39,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:01:39,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:01:39,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:01:39,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:01:39,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:01:39,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:01:39,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:01:39,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:01:39,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:01:39,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:01:39,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:01:39,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:01:39,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:01:39,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:01:39,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:01:39,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:01:39,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:01:39,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:01:39,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:01:39,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:01:39,327 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 [2019-11-06 19:01:39,354 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:01:39,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:01:39,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:01:39,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:01:39,357 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:01:39,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:01:39,357 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:01:39,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:01:39,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:01:39,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:01:39,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:01:39,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:01:39,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:01:39,358 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:01:39,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:01:39,359 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:01:39,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:01:39,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:01:39,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:01:39,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:01:39,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:01:39,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:01:39,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:01:39,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:01:39,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:01:39,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:01:39,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:01:39,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:01:39,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:01:39,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:01:39,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:01:39,639 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:01:39,641 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:01:39,642 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:01:39,642 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2019-11-06 19:01:39,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2feeb8749/16352f3ba2c5481b8f5267cdae40a0fa/FLAG9d32a6867 [2019-11-06 19:01:40,407 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:01:40,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2019-11-06 19:01:40,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2feeb8749/16352f3ba2c5481b8f5267cdae40a0fa/FLAG9d32a6867 [2019-11-06 19:01:40,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2feeb8749/16352f3ba2c5481b8f5267cdae40a0fa [2019-11-06 19:01:40,572 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:01:40,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:01:40,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:40,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:01:40,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:01:40,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:40" (1/1) ... [2019-11-06 19:01:40,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5bfa8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:40, skipping insertion in model container [2019-11-06 19:01:40,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:40" (1/1) ... [2019-11-06 19:01:40,590 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:01:40,665 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:01:41,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:41,477 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:01:41,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:41,889 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:01:41,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41 WrapperNode [2019-11-06 19:01:41,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:41,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:01:41,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:01:41,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:01:41,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (1/1) ... [2019-11-06 19:01:41,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (1/1) ... [2019-11-06 19:01:41,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (1/1) ... [2019-11-06 19:01:41,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (1/1) ... [2019-11-06 19:01:42,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (1/1) ... [2019-11-06 19:01:42,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (1/1) ... [2019-11-06 19:01:42,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (1/1) ... [2019-11-06 19:01:42,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:01:42,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:01:42,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:01:42,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:01:42,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (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 [2019-11-06 19:01:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:01:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:01:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:01:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:01:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:01:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:01:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:01:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:01:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:01:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:01:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:01:43,981 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:01:43,982 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:01:43,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:43 BoogieIcfgContainer [2019-11-06 19:01:43,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:01:43,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:01:43,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:01:43,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:01:43,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:01:40" (1/3) ... [2019-11-06 19:01:43,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79848087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:43, skipping insertion in model container [2019-11-06 19:01:43,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:41" (2/3) ... [2019-11-06 19:01:43,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79848087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:43, skipping insertion in model container [2019-11-06 19:01:43,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:43" (3/3) ... [2019-11-06 19:01:44,002 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label56.c [2019-11-06 19:01:44,017 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:01:44,027 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:01:44,039 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:01:44,084 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:01:44,084 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:01:44,086 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:01:44,086 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:01:44,086 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:01:44,086 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:01:44,087 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:01:44,087 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:01:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:01:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-06 19:01:44,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:44,148 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:44,151 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1923555504, now seen corresponding path program 1 times [2019-11-06 19:01:44,167 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:44,167 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533806431] [2019-11-06 19:01:44,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:45,053 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:45,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533806431] [2019-11-06 19:01:45,230 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:45,230 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:01:45,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710172761] [2019-11-06 19:01:45,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:45,239 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:45,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:45,256 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:01:45,437 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:45,948 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:49,894 INFO L93 Difference]: Finished difference Result 1111 states and 1980 transitions. [2019-11-06 19:01:49,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:49,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-11-06 19:01:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:49,934 INFO L225 Difference]: With dead ends: 1111 [2019-11-06 19:01:49,934 INFO L226 Difference]: Without dead ends: 703 [2019-11-06 19:01:49,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:01:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-11-06 19:01:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 467. [2019-11-06 19:01:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-11-06 19:01:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 718 transitions. [2019-11-06 19:01:50,056 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 718 transitions. Word has length 179 [2019-11-06 19:01:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:50,058 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 718 transitions. [2019-11-06 19:01:50,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 718 transitions. [2019-11-06 19:01:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-06 19:01:50,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:50,065 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:50,066 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:50,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1452588996, now seen corresponding path program 1 times [2019-11-06 19:01:50,067 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:50,067 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97774228] [2019-11-06 19:01:50,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,478 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:50,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97774228] [2019-11-06 19:01:50,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555384024] [2019-11-06 19:01:50,767 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 [2019-11-06 19:01:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:51,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:51,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:51,215 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:51,215 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:01:51,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359154554] [2019-11-06 19:01:51,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:51,221 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:51,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:51,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:51,222 INFO L87 Difference]: Start difference. First operand 467 states and 718 transitions. Second operand 3 states. [2019-11-06 19:01:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:52,264 INFO L93 Difference]: Finished difference Result 1351 states and 2102 transitions. [2019-11-06 19:01:52,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:52,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-11-06 19:01:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:52,270 INFO L225 Difference]: With dead ends: 1351 [2019-11-06 19:01:52,271 INFO L226 Difference]: Without dead ends: 890 [2019-11-06 19:01:52,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2019-11-06 19:01:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2019-11-06 19:01:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-11-06 19:01:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1219 transitions. [2019-11-06 19:01:52,329 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1219 transitions. Word has length 191 [2019-11-06 19:01:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:52,330 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1219 transitions. [2019-11-06 19:01:52,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1219 transitions. [2019-11-06 19:01:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-06 19:01:52,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:52,340 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:52,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:52,542 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash 128275852, now seen corresponding path program 1 times [2019-11-06 19:01:52,543 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:52,543 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890096421] [2019-11-06 19:01:52,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:52,786 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:52,913 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:01:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:53,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890096421] [2019-11-06 19:01:53,107 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:53,109 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:53,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739312143] [2019-11-06 19:01:53,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:53,120 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:53,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:53,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:53,123 INFO L87 Difference]: Start difference. First operand 888 states and 1219 transitions. Second operand 9 states. [2019-11-06 19:01:53,403 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:56,163 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:01:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:56,906 INFO L93 Difference]: Finished difference Result 2746 states and 4151 transitions. [2019-11-06 19:01:56,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:01:56,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 195 [2019-11-06 19:01:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:56,922 INFO L225 Difference]: With dead ends: 2746 [2019-11-06 19:01:56,923 INFO L226 Difference]: Without dead ends: 1864 [2019-11-06 19:01:56,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:01:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2019-11-06 19:01:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1782. [2019-11-06 19:01:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2019-11-06 19:01:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2478 transitions. [2019-11-06 19:01:57,004 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2478 transitions. Word has length 195 [2019-11-06 19:01:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:57,004 INFO L462 AbstractCegarLoop]: Abstraction has 1782 states and 2478 transitions. [2019-11-06 19:01:57,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:01:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2478 transitions. [2019-11-06 19:01:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-06 19:01:57,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:57,011 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:57,012 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -991429437, now seen corresponding path program 1 times [2019-11-06 19:01:57,012 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:57,013 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183609987] [2019-11-06 19:01:57,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:57,198 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:57,446 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183609987] [2019-11-06 19:01:57,447 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:57,447 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:01:57,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385388754] [2019-11-06 19:01:57,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:01:57,448 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:57,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:01:57,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:57,449 INFO L87 Difference]: Start difference. First operand 1782 states and 2478 transitions. Second operand 8 states. [2019-11-06 19:01:57,592 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:58,118 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:02:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:00,949 INFO L93 Difference]: Finished difference Result 5436 states and 8296 transitions. [2019-11-06 19:02:00,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:02:00,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 196 [2019-11-06 19:02:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:00,978 INFO L225 Difference]: With dead ends: 5436 [2019-11-06 19:02:00,978 INFO L226 Difference]: Without dead ends: 3660 [2019-11-06 19:02:00,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:02:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2019-11-06 19:02:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3565. [2019-11-06 19:02:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3565 states. [2019-11-06 19:02:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5046 transitions. [2019-11-06 19:02:01,109 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5046 transitions. Word has length 196 [2019-11-06 19:02:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:01,110 INFO L462 AbstractCegarLoop]: Abstraction has 3565 states and 5046 transitions. [2019-11-06 19:02:01,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:02:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5046 transitions. [2019-11-06 19:02:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 19:02:01,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:01,121 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:02:01,122 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1265853156, now seen corresponding path program 1 times [2019-11-06 19:02:01,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:01,123 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913014467] [2019-11-06 19:02:01,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:01,373 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:02:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:01,599 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:02:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:02:01,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913014467] [2019-11-06 19:02:01,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:02:01,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:02:01,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979713313] [2019-11-06 19:02:01,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:02:01,729 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:01,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:02:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:02:01,730 INFO L87 Difference]: Start difference. First operand 3565 states and 5046 transitions. Second operand 9 states. [2019-11-06 19:02:01,899 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:02:02,313 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:02:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:04,733 INFO L93 Difference]: Finished difference Result 7233 states and 10660 transitions. [2019-11-06 19:02:04,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:02:04,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 203 [2019-11-06 19:02:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:04,760 INFO L225 Difference]: With dead ends: 7233 [2019-11-06 19:02:04,761 INFO L226 Difference]: Without dead ends: 3674 [2019-11-06 19:02:04,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:02:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2019-11-06 19:02:04,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3603. [2019-11-06 19:02:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3603 states. [2019-11-06 19:02:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 4999 transitions. [2019-11-06 19:02:04,879 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 4999 transitions. Word has length 203 [2019-11-06 19:02:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:04,880 INFO L462 AbstractCegarLoop]: Abstraction has 3603 states and 4999 transitions. [2019-11-06 19:02:04,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:02:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 4999 transitions. [2019-11-06 19:02:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-06 19:02:04,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:04,894 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:02:04,895 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash 890454064, now seen corresponding path program 1 times [2019-11-06 19:02:04,896 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:04,896 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112120844] [2019-11-06 19:02:04,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:02:05,282 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112120844] [2019-11-06 19:02:05,282 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996104941] [2019-11-06 19:02:05,284 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 [2019-11-06 19:02:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:02:05,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:02:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 19:02:05,665 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:02:05,665 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:02:05,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644822836] [2019-11-06 19:02:05,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:02:05,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:02:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:02:05,667 INFO L87 Difference]: Start difference. First operand 3603 states and 4999 transitions. Second operand 3 states. [2019-11-06 19:02:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:06,693 INFO L93 Difference]: Finished difference Result 8911 states and 12854 transitions. [2019-11-06 19:02:06,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:02:06,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2019-11-06 19:02:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:06,721 INFO L225 Difference]: With dead ends: 8911 [2019-11-06 19:02:06,721 INFO L226 Difference]: Without dead ends: 5314 [2019-11-06 19:02:06,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:02:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2019-11-06 19:02:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 5311. [2019-11-06 19:02:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5311 states. [2019-11-06 19:02:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5311 states to 5311 states and 7667 transitions. [2019-11-06 19:02:06,885 INFO L78 Accepts]: Start accepts. Automaton has 5311 states and 7667 transitions. Word has length 215 [2019-11-06 19:02:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:06,886 INFO L462 AbstractCegarLoop]: Abstraction has 5311 states and 7667 transitions. [2019-11-06 19:02:06,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:02:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5311 states and 7667 transitions. [2019-11-06 19:02:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-06 19:02:06,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:06,909 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:02:07,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:02:07,114 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1791765692, now seen corresponding path program 1 times [2019-11-06 19:02:07,114 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:07,115 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820265769] [2019-11-06 19:02:07,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:07,368 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:02:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:02:07,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820265769] [2019-11-06 19:02:07,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426846531] [2019-11-06 19:02:07,586 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 [2019-11-06 19:02:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:07,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:02:07,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:02:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 19:02:07,948 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:02:07,948 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:02:07,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109670086] [2019-11-06 19:02:07,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:02:07,950 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:02:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:02:07,951 INFO L87 Difference]: Start difference. First operand 5311 states and 7667 transitions. Second operand 5 states. [2019-11-06 19:02:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:09,492 INFO L93 Difference]: Finished difference Result 10747 states and 16175 transitions. [2019-11-06 19:02:09,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:02:09,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2019-11-06 19:02:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:09,521 INFO L225 Difference]: With dead ends: 10747 [2019-11-06 19:02:09,521 INFO L226 Difference]: Without dead ends: 5442 [2019-11-06 19:02:09,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:02:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2019-11-06 19:02:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5355. [2019-11-06 19:02:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5355 states. [2019-11-06 19:02:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 7127 transitions. [2019-11-06 19:02:09,692 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 7127 transitions. Word has length 223 [2019-11-06 19:02:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:09,693 INFO L462 AbstractCegarLoop]: Abstraction has 5355 states and 7127 transitions. [2019-11-06 19:02:09,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:02:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 7127 transitions. [2019-11-06 19:02:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 19:02:09,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:09,713 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:02:09,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:02:09,929 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:09,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1498504574, now seen corresponding path program 1 times [2019-11-06 19:02:09,930 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:09,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166753764] [2019-11-06 19:02:09,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:10,351 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:02:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:02:10,512 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166753764] [2019-11-06 19:02:10,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970635632] [2019-11-06 19:02:10,516 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 [2019-11-06 19:02:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:10,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:02:10,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:02:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:02:10,773 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:02:10,774 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:02:10,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133027085] [2019-11-06 19:02:10,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:02:10,775 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:10,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:02:10,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:02:10,775 INFO L87 Difference]: Start difference. First operand 5355 states and 7127 transitions. Second operand 3 states. [2019-11-06 19:02:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:12,076 INFO L93 Difference]: Finished difference Result 15628 states and 21373 transitions. [2019-11-06 19:02:12,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:02:12,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2019-11-06 19:02:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:12,143 INFO L225 Difference]: With dead ends: 15628 [2019-11-06 19:02:12,143 INFO L226 Difference]: Without dead ends: 10279 [2019-11-06 19:02:12,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:02:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10279 states. [2019-11-06 19:02:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10279 to 10234. [2019-11-06 19:02:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10234 states. [2019-11-06 19:02:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10234 states to 10234 states and 13887 transitions. [2019-11-06 19:02:12,512 INFO L78 Accepts]: Start accepts. Automaton has 10234 states and 13887 transitions. Word has length 224 [2019-11-06 19:02:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:12,513 INFO L462 AbstractCegarLoop]: Abstraction has 10234 states and 13887 transitions. [2019-11-06 19:02:12,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:02:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 10234 states and 13887 transitions. [2019-11-06 19:02:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-11-06 19:02:12,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:12,546 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:02:12,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:02:12,752 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1178799309, now seen corresponding path program 1 times [2019-11-06 19:02:12,754 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:12,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675422532] [2019-11-06 19:02:12,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:13,045 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:02:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:02:13,257 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675422532] [2019-11-06 19:02:13,257 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551113816] [2019-11-06 19:02:13,257 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 [2019-11-06 19:02:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:13,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:02:13,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:02:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 19:02:13,531 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:02:13,531 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-11-06 19:02:13,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765098251] [2019-11-06 19:02:13,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:02:13,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:02:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:02:13,533 INFO L87 Difference]: Start difference. First operand 10234 states and 13887 transitions. Second operand 5 states.