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/Problem16_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:38,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:38,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:38,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:38,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:38,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:38,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:38,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:38,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:38,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:38,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:38,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:38,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:38,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:38,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:38,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:38,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:38,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:38,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:38,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:38,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:38,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:38,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:38,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:38,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:05:38,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:05:38,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:05:38,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:05:38,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:05:38,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:05:38,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:38,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:38,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:38,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:38,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:38,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:38,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:38,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:38,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:38,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:38,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:38,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:05:38,939 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:38,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:38,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:38,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:38,941 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:38,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:38,942 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:38,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:38,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:38,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:38,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:38,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:38,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:38,943 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:38,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:38,943 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:38,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:38,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:38,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:38,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:38,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:38,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:38,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:38,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:38,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:38,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:38,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:38,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:38,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:39,208 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:39,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:39,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:39,237 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:39,237 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:39,239 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-13 18:05:39,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59511bd32/e4efffc6f3084dd1ad8a575512ad786f/FLAG56ece4053 [2019-10-13 18:05:40,008 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:40,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-13 18:05:40,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59511bd32/e4efffc6f3084dd1ad8a575512ad786f/FLAG56ece4053 [2019-10-13 18:05:40,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59511bd32/e4efffc6f3084dd1ad8a575512ad786f [2019-10-13 18:05:40,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:40,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:40,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:40,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:40,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:40,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:40" (1/1) ... [2019-10-13 18:05:40,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32833bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:40, skipping insertion in model container [2019-10-13 18:05:40,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:40" (1/1) ... [2019-10-13 18:05:40,159 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:40,245 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:41,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:41,283 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:41,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:41,535 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:41,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41 WrapperNode [2019-10-13 18:05:41,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:41,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:41,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:41,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:41,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... [2019-10-13 18:05:41,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... [2019-10-13 18:05:41,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... [2019-10-13 18:05:41,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... [2019-10-13 18:05:41,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... [2019-10-13 18:05:41,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... [2019-10-13 18:05:41,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... [2019-10-13 18:05:41,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:41,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:41,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:41,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:41,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:41,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:44,267 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:44,267 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:44,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:44 BoogieIcfgContainer [2019-10-13 18:05:44,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:44,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:44,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:44,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:44,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:40" (1/3) ... [2019-10-13 18:05:44,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b145de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:44, skipping insertion in model container [2019-10-13 18:05:44,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:41" (2/3) ... [2019-10-13 18:05:44,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b145de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:44, skipping insertion in model container [2019-10-13 18:05:44,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:44" (3/3) ... [2019-10-13 18:05:44,277 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-10-13 18:05:44,287 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:44,295 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:44,307 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:44,344 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:44,344 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:44,344 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:44,344 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:44,344 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:44,345 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:44,345 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:44,345 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 18:05:44,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:44,397 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] [2019-10-13 18:05:44,399 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1393249942, now seen corresponding path program 1 times [2019-10-13 18:05:44,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:44,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198949872] [2019-10-13 18:05:44,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:44,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:44,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:44,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198949872] [2019-10-13 18:05:44,903 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:44,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:44,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689902518] [2019-10-13 18:05:44,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:44,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:44,929 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:50,007 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:05:50,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:50,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-13 18:05:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:50,039 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:50,039 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:50,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-13 18:05:50,162 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 69 [2019-10-13 18:05:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:50,163 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-13 18:05:50,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-13 18:05:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-10-13 18:05:50,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:50,195 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:05:50,195 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2127860689, now seen corresponding path program 1 times [2019-10-13 18:05:50,196 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:50,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397524186] [2019-10-13 18:05:50,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:50,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:50,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:50,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397524186] [2019-10-13 18:05:50,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732584850] [2019-10-13 18:05:50,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:50,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 18:05:50,897 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:50,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:05:50,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915858798] [2019-10-13 18:05:50,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:50,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:50,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:50,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:50,904 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-13 18:05:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:54,389 INFO L93 Difference]: Finished difference Result 3133 states and 5148 transitions. [2019-10-13 18:05:54,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:54,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2019-10-13 18:05:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:54,406 INFO L225 Difference]: With dead ends: 3133 [2019-10-13 18:05:54,407 INFO L226 Difference]: Without dead ends: 2108 [2019-10-13 18:05:54,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-10-13 18:05:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2078. [2019-10-13 18:05:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-13 18:05:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-10-13 18:05:54,545 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 236 [2019-10-13 18:05:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:54,548 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-10-13 18:05:54,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-10-13 18:05:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-13 18:05:54,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:54,559 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:05:54,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:54,762 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1631884023, now seen corresponding path program 1 times [2019-10-13 18:05:54,764 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:54,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248140077] [2019-10-13 18:05:54,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:54,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:54,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 124 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:55,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248140077] [2019-10-13 18:05:55,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878714860] [2019-10-13 18:05:55,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:55,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:55,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 18:05:55,329 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:55,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:55,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961335823] [2019-10-13 18:05:55,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:55,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:55,331 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-10-13 18:05:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:58,170 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-10-13 18:05:58,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:58,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-13 18:05:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:58,197 INFO L225 Difference]: With dead ends: 6302 [2019-10-13 18:05:58,197 INFO L226 Difference]: Without dead ends: 4230 [2019-10-13 18:05:58,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-13 18:05:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-13 18:05:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-13 18:05:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5870 transitions. [2019-10-13 18:05:58,350 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5870 transitions. Word has length 240 [2019-10-13 18:05:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:58,352 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5870 transitions. [2019-10-13 18:05:58,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5870 transitions. [2019-10-13 18:05:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-10-13 18:05:58,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:58,360 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:58,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:58,564 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1814388998, now seen corresponding path program 1 times [2019-10-13 18:05:58,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:58,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857879874] [2019-10-13 18:05:58,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:58,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:58,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 267 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 18:05:59,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857879874] [2019-10-13 18:05:59,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905359373] [2019-10-13 18:05:59,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:59,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:59,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 18:05:59,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:59,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:05:59,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958775978] [2019-10-13 18:05:59,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:59,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:59,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:59,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:59,317 INFO L87 Difference]: Start difference. First operand 4208 states and 5870 transitions. Second operand 11 states. [2019-10-13 18:06:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:03,903 INFO L93 Difference]: Finished difference Result 10864 states and 15773 transitions. [2019-10-13 18:06:03,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:06:03,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 335 [2019-10-13 18:06:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:03,937 INFO L225 Difference]: With dead ends: 10864 [2019-10-13 18:06:03,937 INFO L226 Difference]: Without dead ends: 6662 [2019-10-13 18:06:03,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:06:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-13 18:06:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 5269. [2019-10-13 18:06:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5269 states. [2019-10-13 18:06:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5269 states to 5269 states and 7276 transitions. [2019-10-13 18:06:04,133 INFO L78 Accepts]: Start accepts. Automaton has 5269 states and 7276 transitions. Word has length 335 [2019-10-13 18:06:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:04,135 INFO L462 AbstractCegarLoop]: Abstraction has 5269 states and 7276 transitions. [2019-10-13 18:06:04,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5269 states and 7276 transitions. [2019-10-13 18:06:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2019-10-13 18:06:04,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:04,154 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:06:04,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:04,361 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash 306583982, now seen corresponding path program 1 times [2019-10-13 18:06:04,363 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:04,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752652330] [2019-10-13 18:06:04,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:04,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:04,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 186 proven. 197 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:06:04,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752652330] [2019-10-13 18:06:04,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363571444] [2019-10-13 18:06:04,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:05,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:05,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-10-13 18:06:05,154 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:05,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:05,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378213094] [2019-10-13 18:06:05,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:05,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:05,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:05,156 INFO L87 Difference]: Start difference. First operand 5269 states and 7276 transitions. Second operand 5 states. [2019-10-13 18:06:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:09,011 INFO L93 Difference]: Finished difference Result 11933 states and 16530 transitions. [2019-10-13 18:06:09,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:06:09,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2019-10-13 18:06:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:09,045 INFO L225 Difference]: With dead ends: 11933 [2019-10-13 18:06:09,045 INFO L226 Difference]: Without dead ends: 6670 [2019-10-13 18:06:09,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2019-10-13 18:06:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 6646. [2019-10-13 18:06:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6646 states. [2019-10-13 18:06:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 8452 transitions. [2019-10-13 18:06:09,225 INFO L78 Accepts]: Start accepts. Automaton has 6646 states and 8452 transitions. Word has length 411 [2019-10-13 18:06:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:09,226 INFO L462 AbstractCegarLoop]: Abstraction has 6646 states and 8452 transitions. [2019-10-13 18:06:09,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6646 states and 8452 transitions. [2019-10-13 18:06:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2019-10-13 18:06:09,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:09,242 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2019-10-13 18:06:09,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:09,446 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash 665499114, now seen corresponding path program 1 times [2019-10-13 18:06:09,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:09,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906954350] [2019-10-13 18:06:09,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:09,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:09,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 302 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 18:06:10,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906954350] [2019-10-13 18:06:10,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040192483] [2019-10-13 18:06:10,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:10,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 420 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 18:06:10,688 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:10,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:10,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088832560] [2019-10-13 18:06:10,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:10,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:10,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:10,691 INFO L87 Difference]: Start difference. First operand 6646 states and 8452 transitions. Second operand 11 states.