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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:53,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:53,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:53,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:53,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:53,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:53,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:53,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:53,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:53,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:53,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:53,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:53,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:53,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:53,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:53,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:53,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:53,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:53,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:53,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:53,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:53,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:53,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:53,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:53,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:55:53,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:55:53,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:55:53,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:55:53,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:55:53,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:55:53,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:53,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:53,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:53,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:53,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:53,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:53,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:53,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:53,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:53,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:53,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:53,999 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 17:55:54,019 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:54,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:54,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:54,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:54,022 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:54,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:54,022 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:54,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:54,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:54,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:54,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:54,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:54,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:54,025 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:54,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:54,025 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:54,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:54,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:54,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:54,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:54,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:54,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:54,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:54,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:54,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:54,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:54,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:54,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:54,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:54,298 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:54,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:54,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:54,317 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:54,317 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:54,318 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label45.c [2019-10-13 17:55:54,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1edd67383/6cefef5e645647eaaf7ce8cc374bc620/FLAG0efdf0a72 [2019-10-13 17:55:55,073 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:55,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label45.c [2019-10-13 17:55:55,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1edd67383/6cefef5e645647eaaf7ce8cc374bc620/FLAG0efdf0a72 [2019-10-13 17:55:55,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1edd67383/6cefef5e645647eaaf7ce8cc374bc620 [2019-10-13 17:55:55,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:55,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:55,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:55,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:55,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:55,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:55" (1/1) ... [2019-10-13 17:55:55,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:55, skipping insertion in model container [2019-10-13 17:55:55,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:55" (1/1) ... [2019-10-13 17:55:55,258 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:55,334 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:56,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:56,092 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:56,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:56,402 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:56,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56 WrapperNode [2019-10-13 17:55:56,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:56,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:56,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:56,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:56,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (1/1) ... [2019-10-13 17:55:56,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (1/1) ... [2019-10-13 17:55:56,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (1/1) ... [2019-10-13 17:55:56,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (1/1) ... [2019-10-13 17:55:56,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (1/1) ... [2019-10-13 17:55:56,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (1/1) ... [2019-10-13 17:55:56,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (1/1) ... [2019-10-13 17:55:56,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:56,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:56,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:56,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:56,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (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 17:55:56,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:58,444 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:58,447 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:58,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:58 BoogieIcfgContainer [2019-10-13 17:55:58,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:58,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:58,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:58,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:58,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:55" (1/3) ... [2019-10-13 17:55:58,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c53df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:58, skipping insertion in model container [2019-10-13 17:55:58,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:56" (2/3) ... [2019-10-13 17:55:58,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c53df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:58, skipping insertion in model container [2019-10-13 17:55:58,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:58" (3/3) ... [2019-10-13 17:55:58,469 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2019-10-13 17:55:58,485 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:58,499 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:58,515 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:58,562 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:58,562 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:58,562 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:58,563 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:58,563 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:58,564 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:58,564 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:58,564 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 17:55:58,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:58,634 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] [2019-10-13 17:55:58,636 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:58,646 INFO L82 PathProgramCache]: Analyzing trace with hash -148239995, now seen corresponding path program 1 times [2019-10-13 17:55:58,659 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:58,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788582535] [2019-10-13 17:55:58,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:58,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:58,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,602 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:59,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788582535] [2019-10-13 17:55:59,710 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:59,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:59,711 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783337605] [2019-10-13 17:55:59,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:59,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:59,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:59,733 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:59,960 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:00,256 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-13 17:56:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:03,689 INFO L93 Difference]: Finished difference Result 1090 states and 1957 transitions. [2019-10-13 17:56:03,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:56:03,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-10-13 17:56:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:03,725 INFO L225 Difference]: With dead ends: 1090 [2019-10-13 17:56:03,725 INFO L226 Difference]: Without dead ends: 695 [2019-10-13 17:56:03,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:56:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2019-10-13 17:56:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 464. [2019-10-13 17:56:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-13 17:56:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 754 transitions. [2019-10-13 17:56:03,864 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 754 transitions. Word has length 150 [2019-10-13 17:56:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:03,866 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 754 transitions. [2019-10-13 17:56:03,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:56:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 754 transitions. [2019-10-13 17:56:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 17:56:03,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:03,872 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:03,872 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash 87517660, now seen corresponding path program 1 times [2019-10-13 17:56:03,873 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:03,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754576157] [2019-10-13 17:56:03,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:03,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:03,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:04,115 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:04,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754576157] [2019-10-13 17:56:04,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:04,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:56:04,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320408401] [2019-10-13 17:56:04,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:56:04,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:56:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:56:04,265 INFO L87 Difference]: Start difference. First operand 464 states and 754 transitions. Second operand 8 states. [2019-10-13 17:56:04,427 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:04,733 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:05,128 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:08,703 INFO L93 Difference]: Finished difference Result 1809 states and 3011 transitions. [2019-10-13 17:56:08,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:56:08,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 160 [2019-10-13 17:56:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:08,712 INFO L225 Difference]: With dead ends: 1809 [2019-10-13 17:56:08,712 INFO L226 Difference]: Without dead ends: 1351 [2019-10-13 17:56:08,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:56:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2019-10-13 17:56:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1332. [2019-10-13 17:56:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-10-13 17:56:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 2021 transitions. [2019-10-13 17:56:08,782 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 2021 transitions. Word has length 160 [2019-10-13 17:56:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:08,783 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 2021 transitions. [2019-10-13 17:56:08,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:56:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 2021 transitions. [2019-10-13 17:56:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 17:56:08,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:08,789 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:08,789 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -619691973, now seen corresponding path program 1 times [2019-10-13 17:56:08,790 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:08,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460150215] [2019-10-13 17:56:08,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:08,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:08,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,020 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:56:09,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460150215] [2019-10-13 17:56:09,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816913677] [2019-10-13 17:56:09,260 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 17:56:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:56:09,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:56:09,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:09,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:56:09,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885552463] [2019-10-13 17:56:09,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:56:09,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:56:09,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:09,582 INFO L87 Difference]: Start difference. First operand 1332 states and 2021 transitions. Second operand 3 states. [2019-10-13 17:56:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:10,127 INFO L93 Difference]: Finished difference Result 2657 states and 4037 transitions. [2019-10-13 17:56:10,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:56:10,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2019-10-13 17:56:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:10,135 INFO L225 Difference]: With dead ends: 2657 [2019-10-13 17:56:10,135 INFO L226 Difference]: Without dead ends: 1331 [2019-10-13 17:56:10,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2019-10-13 17:56:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1331. [2019-10-13 17:56:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2019-10-13 17:56:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2019 transitions. [2019-10-13 17:56:10,185 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2019 transitions. Word has length 169 [2019-10-13 17:56:10,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:10,185 INFO L462 AbstractCegarLoop]: Abstraction has 1331 states and 2019 transitions. [2019-10-13 17:56:10,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:56:10,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2019 transitions. [2019-10-13 17:56:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 17:56:10,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:10,191 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:56:10,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:10,397 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -550416511, now seen corresponding path program 1 times [2019-10-13 17:56:10,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:10,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335318324] [2019-10-13 17:56:10,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:10,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:10,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:10,652 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:56:10,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335318324] [2019-10-13 17:56:10,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663060507] [2019-10-13 17:56:10,899 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 17:56:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:11,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:56:11,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:56:11,217 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:11,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 17:56:11,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386056999] [2019-10-13 17:56:11,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:56:11,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:56:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:11,220 INFO L87 Difference]: Start difference. First operand 1331 states and 2019 transitions. Second operand 5 states. [2019-10-13 17:56:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:11,784 INFO L93 Difference]: Finished difference Result 4025 states and 6245 transitions. [2019-10-13 17:56:11,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:56:11,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-13 17:56:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:11,806 INFO L225 Difference]: With dead ends: 4025 [2019-10-13 17:56:11,807 INFO L226 Difference]: Without dead ends: 2700 [2019-10-13 17:56:11,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:56:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2019-10-13 17:56:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2671. [2019-10-13 17:56:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2671 states. [2019-10-13 17:56:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 4086 transitions. [2019-10-13 17:56:11,941 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 4086 transitions. Word has length 186 [2019-10-13 17:56:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:11,941 INFO L462 AbstractCegarLoop]: Abstraction has 2671 states and 4086 transitions. [2019-10-13 17:56:11,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:56:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 4086 transitions. [2019-10-13 17:56:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 17:56:11,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:11,954 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:56:12,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:12,161 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1564959750, now seen corresponding path program 1 times [2019-10-13 17:56:12,162 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:12,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790876229] [2019-10-13 17:56:12,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:12,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:12,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:12,399 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:12,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790876229] [2019-10-13 17:56:12,684 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:12,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:56:12,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651686526] [2019-10-13 17:56:12,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:56:12,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:12,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:56:12,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:12,687 INFO L87 Difference]: Start difference. First operand 2671 states and 4086 transitions. Second operand 9 states. [2019-10-13 17:56:12,852 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:15,565 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:56:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:16,542 INFO L93 Difference]: Finished difference Result 8249 states and 14739 transitions. [2019-10-13 17:56:16,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:56:16,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 186 [2019-10-13 17:56:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:16,594 INFO L225 Difference]: With dead ends: 8249 [2019-10-13 17:56:16,594 INFO L226 Difference]: Without dead ends: 5584 [2019-10-13 17:56:16,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:56:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2019-10-13 17:56:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 5315. [2019-10-13 17:56:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2019-10-13 17:56:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8346 transitions. [2019-10-13 17:56:16,882 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8346 transitions. Word has length 186 [2019-10-13 17:56:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:16,883 INFO L462 AbstractCegarLoop]: Abstraction has 5315 states and 8346 transitions. [2019-10-13 17:56:16,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:56:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8346 transitions. [2019-10-13 17:56:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 17:56:16,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:16,901 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:56:16,902 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1785080146, now seen corresponding path program 1 times [2019-10-13 17:56:16,906 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:16,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262569109] [2019-10-13 17:56:16,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:16,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:16,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:17,171 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:56:17,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262569109] [2019-10-13 17:56:17,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878709236] [2019-10-13 17:56:17,483 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 17:56:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:17,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:17,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:17,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:56:17,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 17:56:17,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246291777] [2019-10-13 17:56:17,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:56:17,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:56:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:17,735 INFO L87 Difference]: Start difference. First operand 5315 states and 8346 transitions. Second operand 11 states. [2019-10-13 17:56:17,945 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:18,245 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:18,823 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:22,733 INFO L93 Difference]: Finished difference Result 20706 states and 35967 transitions. [2019-10-13 17:56:22,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:56:22,733 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 189 [2019-10-13 17:56:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:22,860 INFO L225 Difference]: With dead ends: 20706 [2019-10-13 17:56:22,860 INFO L226 Difference]: Without dead ends: 15397 [2019-10-13 17:56:22,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:56:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15397 states. [2019-10-13 17:56:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15397 to 15199. [2019-10-13 17:56:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15199 states. [2019-10-13 17:56:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15199 states to 15199 states and 21642 transitions. [2019-10-13 17:56:23,526 INFO L78 Accepts]: Start accepts. Automaton has 15199 states and 21642 transitions. Word has length 189 [2019-10-13 17:56:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:23,526 INFO L462 AbstractCegarLoop]: Abstraction has 15199 states and 21642 transitions. [2019-10-13 17:56:23,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:56:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15199 states and 21642 transitions. [2019-10-13 17:56:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-13 17:56:23,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:23,567 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:56:23,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:23,771 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash 153212094, now seen corresponding path program 1 times [2019-10-13 17:56:23,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:23,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050723551] [2019-10-13 17:56:23,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:23,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:23,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,070 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:56:24,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050723551] [2019-10-13 17:56:24,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380909530] [2019-10-13 17:56:24,299 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 17:56:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:56:24,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:56:24,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:24,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 17:56:24,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101771928] [2019-10-13 17:56:24,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:56:24,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:24,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:56:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:24,594 INFO L87 Difference]: Start difference. First operand 15199 states and 21642 transitions. Second operand 5 states. [2019-10-13 17:56:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:26,414 INFO L93 Difference]: Finished difference Result 42040 states and 63039 transitions. [2019-10-13 17:56:26,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:56:26,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2019-10-13 17:56:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:26,535 INFO L225 Difference]: With dead ends: 42040 [2019-10-13 17:56:26,535 INFO L226 Difference]: Without dead ends: 26847 [2019-10-13 17:56:26,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:56:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26847 states. [2019-10-13 17:56:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26847 to 26163. [2019-10-13 17:56:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26163 states. [2019-10-13 17:56:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26163 states to 26163 states and 37079 transitions. [2019-10-13 17:56:28,385 INFO L78 Accepts]: Start accepts. Automaton has 26163 states and 37079 transitions. Word has length 213 [2019-10-13 17:56:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:28,385 INFO L462 AbstractCegarLoop]: Abstraction has 26163 states and 37079 transitions. [2019-10-13 17:56:28,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:56:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 26163 states and 37079 transitions. [2019-10-13 17:56:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 17:56:28,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:28,445 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2019-10-13 17:56:28,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:28,653 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1662383557, now seen corresponding path program 1 times [2019-10-13 17:56:28,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:28,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979886151] [2019-10-13 17:56:28,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:28,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:28,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:28,875 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 17:56:29,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979886151] [2019-10-13 17:56:29,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849131638] [2019-10-13 17:56:29,120 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