/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:04:42,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:04:42,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:04:42,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:04:42,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:04:42,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:04:42,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:04:42,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:04:42,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:04:42,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:04:42,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:04:42,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:04:42,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:04:42,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:04:42,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:04:42,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:04:42,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:04:42,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:04:42,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:04:42,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:04:42,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:04:42,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:04:42,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:04:42,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:04:42,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:04:42,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:04:42,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:04:42,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:04:42,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:04:42,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:04:42,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:04:42,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:04:42,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:04:42,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:04:42,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:04:42,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:04:42,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:04:42,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:04:42,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:04:42,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:04:42,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:04:42,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:04:42,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:04:42,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:04:42,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:04:42,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:04:42,894 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:04:42,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:04:42,894 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:04:42,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:04:42,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:04:42,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:04:42,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:04:42,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:04:42,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:04:42,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:04:42,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:04:42,897 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:04:42,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:04:42,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:04:42,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:04:42,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:04:42,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:04:42,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:04:42,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:04:42,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:04:42,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:04:42,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:04:42,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:04:42,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:04:42,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:04:43,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:04:43,191 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:04:43,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:04:43,196 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:04:43,197 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:04:43,198 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label14.c [2019-11-06 19:04:43,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a879f806/45528c8458d44057aa8ad6d471a6bae6/FLAG741163be2 [2019-11-06 19:04:43,871 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:04:43,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label14.c [2019-11-06 19:04:43,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a879f806/45528c8458d44057aa8ad6d471a6bae6/FLAG741163be2 [2019-11-06 19:04:44,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a879f806/45528c8458d44057aa8ad6d471a6bae6 [2019-11-06 19:04:44,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:04:44,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:04:44,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:44,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:04:44,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:04:44,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:44" (1/1) ... [2019-11-06 19:04:44,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f3db85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:44, skipping insertion in model container [2019-11-06 19:04:44,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:44" (1/1) ... [2019-11-06 19:04:44,203 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:04:44,268 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:04:44,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:44,866 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:04:45,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:45,020 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:04:45,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45 WrapperNode [2019-11-06 19:04:45,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:45,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:04:45,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:04:45,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:04:45,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... [2019-11-06 19:04:45,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... [2019-11-06 19:04:45,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... [2019-11-06 19:04:45,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... [2019-11-06 19:04:45,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... [2019-11-06 19:04:45,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... [2019-11-06 19:04:45,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... [2019-11-06 19:04:45,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:04:45,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:04:45,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:04:45,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:04:45,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:04:45,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:04:45,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:04:45,188 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:04:45,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:04:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:04:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:04:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:04:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:04:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:04:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:04:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:04:46,469 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:04:46,469 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:04:46,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:46 BoogieIcfgContainer [2019-11-06 19:04:46,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:04:46,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:04:46,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:04:46,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:04:46,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:04:44" (1/3) ... [2019-11-06 19:04:46,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4046c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:46, skipping insertion in model container [2019-11-06 19:04:46,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:45" (2/3) ... [2019-11-06 19:04:46,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4046c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:46, skipping insertion in model container [2019-11-06 19:04:46,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:46" (3/3) ... [2019-11-06 19:04:46,480 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label14.c [2019-11-06 19:04:46,490 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:04:46,498 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:04:46,511 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:04:46,539 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:04:46,540 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:04:46,540 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:04:46,540 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:04:46,540 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:04:46,541 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:04:46,541 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:04:46,541 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:04:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 19:04:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 19:04:46,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:46,574 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:46,576 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1721053394, now seen corresponding path program 1 times [2019-11-06 19:04:46,591 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:46,591 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651811369] [2019-11-06 19:04:46,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:46,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651811369] [2019-11-06 19:04:46,935 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:04:46,936 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:04:46,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228548651] [2019-11-06 19:04:46,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:46,943 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:04:46,960 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-11-06 19:04:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:48,976 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-11-06 19:04:48,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:48,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-11-06 19:04:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:48,996 INFO L225 Difference]: With dead ends: 730 [2019-11-06 19:04:48,996 INFO L226 Difference]: Without dead ends: 447 [2019-11-06 19:04:49,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:04:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-06 19:04:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-11-06 19:04:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-11-06 19:04:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-11-06 19:04:49,119 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 37 [2019-11-06 19:04:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:49,120 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-11-06 19:04:49,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-11-06 19:04:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 19:04:49,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:49,129 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:49,130 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:49,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:49,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1761481729, now seen corresponding path program 1 times [2019-11-06 19:04:49,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:49,131 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363973388] [2019-11-06 19:04:49,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:49,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363973388] [2019-11-06 19:04:49,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580063663] [2019-11-06 19:04:49,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:04:49,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:49,772 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:49,773 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:04:49,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779059630] [2019-11-06 19:04:49,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:49,775 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:49,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:49,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:04:49,776 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 5 states. [2019-11-06 19:04:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:50,737 INFO L93 Difference]: Finished difference Result 1031 states and 1586 transitions. [2019-11-06 19:04:50,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:50,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-11-06 19:04:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:50,744 INFO L225 Difference]: With dead ends: 1031 [2019-11-06 19:04:50,744 INFO L226 Difference]: Without dead ends: 596 [2019-11-06 19:04:50,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-11-06 19:04:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2019-11-06 19:04:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-06 19:04:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 865 transitions. [2019-11-06 19:04:50,783 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 865 transitions. Word has length 156 [2019-11-06 19:04:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:50,785 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 865 transitions. [2019-11-06 19:04:50,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 865 transitions. [2019-11-06 19:04:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-06 19:04:50,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:50,791 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:50,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:50,998 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash 630639194, now seen corresponding path program 1 times [2019-11-06 19:04:51,000 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:51,000 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800706736] [2019-11-06 19:04:51,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:51,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800706736] [2019-11-06 19:04:51,481 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:04:51,481 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:04:51,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767009944] [2019-11-06 19:04:51,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:04:51,489 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:04:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:04:51,492 INFO L87 Difference]: Start difference. First operand 590 states and 865 transitions. Second operand 9 states. [2019-11-06 19:04:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:53,641 INFO L93 Difference]: Finished difference Result 1939 states and 3010 transitions. [2019-11-06 19:04:53,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:04:53,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2019-11-06 19:04:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:53,660 INFO L225 Difference]: With dead ends: 1939 [2019-11-06 19:04:53,660 INFO L226 Difference]: Without dead ends: 1355 [2019-11-06 19:04:53,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:04:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-11-06 19:04:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 894. [2019-11-06 19:04:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-11-06 19:04:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1190 transitions. [2019-11-06 19:04:53,727 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1190 transitions. Word has length 163 [2019-11-06 19:04:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:53,729 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1190 transitions. [2019-11-06 19:04:53,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:04:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1190 transitions. [2019-11-06 19:04:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-06 19:04:53,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:53,745 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:53,745 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -545211835, now seen corresponding path program 1 times [2019-11-06 19:04:53,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:53,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562524339] [2019-11-06 19:04:53,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:54,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562524339] [2019-11-06 19:04:54,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985290597] [2019-11-06 19:04:54,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:54,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:54,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:54,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:04:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:54,540 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:54,540 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-06 19:04:54,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393952403] [2019-11-06 19:04:54,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:04:54,542 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:04:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:04:54,542 INFO L87 Difference]: Start difference. First operand 894 states and 1190 transitions. Second operand 15 states. [2019-11-06 19:04:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:59,214 INFO L93 Difference]: Finished difference Result 2114 states and 2917 transitions. [2019-11-06 19:04:59,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 19:04:59,215 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 226 [2019-11-06 19:04:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:59,227 INFO L225 Difference]: With dead ends: 2114 [2019-11-06 19:04:59,227 INFO L226 Difference]: Without dead ends: 1369 [2019-11-06 19:04:59,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 19:04:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2019-11-06 19:04:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1051. [2019-11-06 19:04:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-11-06 19:04:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1323 transitions. [2019-11-06 19:04:59,289 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1323 transitions. Word has length 226 [2019-11-06 19:04:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:59,290 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 1323 transitions. [2019-11-06 19:04:59,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 19:04:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1323 transitions. [2019-11-06 19:04:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-06 19:04:59,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:59,298 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:04:59,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:59,503 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:59,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1220888374, now seen corresponding path program 1 times [2019-11-06 19:04:59,504 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:59,505 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632116440] [2019-11-06 19:04:59,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:59,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632116440] [2019-11-06 19:04:59,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629237935] [2019-11-06 19:04:59,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:59,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:59,995 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:59,996 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:04:59,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235060193] [2019-11-06 19:04:59,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:04:59,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:59,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:04:59,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:59,998 INFO L87 Difference]: Start difference. First operand 1051 states and 1323 transitions. Second operand 11 states. [2019-11-06 19:05:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:03,293 INFO L93 Difference]: Finished difference Result 3243 states and 4611 transitions. [2019-11-06 19:05:03,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 19:05:03,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 241 [2019-11-06 19:05:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:03,304 INFO L225 Difference]: With dead ends: 3243 [2019-11-06 19:05:03,304 INFO L226 Difference]: Without dead ends: 1258 [2019-11-06 19:05:03,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:05:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2019-11-06 19:05:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1228. [2019-11-06 19:05:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-11-06 19:05:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1503 transitions. [2019-11-06 19:05:03,370 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1503 transitions. Word has length 241 [2019-11-06 19:05:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:03,370 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1503 transitions. [2019-11-06 19:05:03,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:05:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1503 transitions. [2019-11-06 19:05:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-11-06 19:05:03,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:03,377 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:05:03,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:03,582 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1555176578, now seen corresponding path program 1 times [2019-11-06 19:05:03,583 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:03,583 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440317966] [2019-11-06 19:05:03,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 60 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:05:03,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440317966] [2019-11-06 19:05:03,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574941004] [2019-11-06 19:05:03,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:03,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:05:03,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 19:05:04,045 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:05:04,046 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:05:04,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560439437] [2019-11-06 19:05:04,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:05:04,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:04,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:05:04,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:05:04,048 INFO L87 Difference]: Start difference. First operand 1228 states and 1503 transitions. Second operand 5 states. [2019-11-06 19:05:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:04,875 INFO L93 Difference]: Finished difference Result 2281 states and 2775 transitions. [2019-11-06 19:05:04,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:05:04,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2019-11-06 19:05:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:04,881 INFO L225 Difference]: With dead ends: 2281 [2019-11-06 19:05:04,882 INFO L226 Difference]: Without dead ends: 1218 [2019-11-06 19:05:04,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:05:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-11-06 19:05:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1196. [2019-11-06 19:05:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-11-06 19:05:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1370 transitions. [2019-11-06 19:05:04,915 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1370 transitions. Word has length 251 [2019-11-06 19:05:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:04,915 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1370 transitions. [2019-11-06 19:05:04,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:05:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1370 transitions. [2019-11-06 19:05:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-11-06 19:05:04,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:04,922 INFO L410 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, 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, 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] [2019-11-06 19:05:05,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:05,126 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash 677384141, now seen corresponding path program 1 times [2019-11-06 19:05:05,128 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:05,128 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296700762] [2019-11-06 19:05:05,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 245 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 19:05:06,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296700762] [2019-11-06 19:05:06,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364124736] [2019-11-06 19:05:06,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:06,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:05:06,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:06,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:06,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:06,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:06,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:06,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:06,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:06,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:06,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:18,896 WARN L191 SmtUtils]: Spent 12.32 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-11-06 19:05:18,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:05:19,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 19:05:19,225 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:05:19,225 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-06 19:05:19,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220914199] [2019-11-06 19:05:19,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 19:05:19,227 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:19,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 19:05:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-11-06 19:05:19,228 INFO L87 Difference]: Start difference. First operand 1196 states and 1370 transitions. Second operand 24 states. [2019-11-06 19:05:20,564 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51