/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/Problem16_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:56,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:56,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:56,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:18:56,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:18:56,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:18:56,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:18:56,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:18:56,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:18:56,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:18:56,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:18:56,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:18:56,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:56,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:56,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:56,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:56,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:56,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:56,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:56,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:56,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:56,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:56,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:56,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:56,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:18:56,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:18:56,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:18:56,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:18:56,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:18:56,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:18:56,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:18:56,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:18:56,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:18:56,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:18:56,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:18:56,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:18:56,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:18:56,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:18:56,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:56,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:56,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:56,197 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 19:18:56,219 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:56,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:56,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:56,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:56,224 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:56,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:56,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:56,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:56,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:56,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:56,226 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:56,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:56,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:56,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:56,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:56,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:56,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:56,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:56,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:56,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:56,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:56,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:56,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:56,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:56,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:56,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:56,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:56,523 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:56,524 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:56,525 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-11-06 19:18:56,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab6427b93/95bf69482870464aaadddbe53085f8dc/FLAG12efa79a7 [2019-11-06 19:18:57,259 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:57,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-11-06 19:18:57,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab6427b93/95bf69482870464aaadddbe53085f8dc/FLAG12efa79a7 [2019-11-06 19:18:57,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab6427b93/95bf69482870464aaadddbe53085f8dc [2019-11-06 19:18:57,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:57,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:57,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:57,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:57,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:57,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:57" (1/1) ... [2019-11-06 19:18:57,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68dfb264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:57, skipping insertion in model container [2019-11-06 19:18:57,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:57" (1/1) ... [2019-11-06 19:18:57,479 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:57,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:58,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:58,497 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:58,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:58,826 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:58,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58 WrapperNode [2019-11-06 19:18:58,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:58,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:58,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:58,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:58,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:58,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:58,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:58,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:58,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (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 19:18:59,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:01,464 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:01,464 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:01,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:01 BoogieIcfgContainer [2019-11-06 19:19:01,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:01,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:01,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:01,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:01,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:57" (1/3) ... [2019-11-06 19:19:01,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a33bc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:01, skipping insertion in model container [2019-11-06 19:19:01,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (2/3) ... [2019-11-06 19:19:01,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a33bc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:01, skipping insertion in model container [2019-11-06 19:19:01,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:01" (3/3) ... [2019-11-06 19:19:01,476 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-11-06 19:19:01,488 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:01,498 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:01,513 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:01,560 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:01,561 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:01,561 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:01,561 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:01,561 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:01,562 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:01,562 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:01,562 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 19:19:01,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:01,624 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:01,626 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:01,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1393249942, now seen corresponding path program 1 times [2019-11-06 19:19:01,645 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:01,646 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253753179] [2019-11-06 19:19:01,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:02,164 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 19:19:02,164 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253753179] [2019-11-06 19:19:02,165 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:02,166 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:02,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125436504] [2019-11-06 19:19:02,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:02,176 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:02,195 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:07,218 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:19:07,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:07,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-11-06 19:19:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:07,245 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:07,246 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:07,255 INFO L630 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 [2019-11-06 19:19:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-11-06 19:19:07,384 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 69 [2019-11-06 19:19:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:07,385 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-11-06 19:19:07,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-11-06 19:19:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-11-06 19:19:07,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:07,404 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, 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] [2019-11-06 19:19:07,404 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2127860689, now seen corresponding path program 1 times [2019-11-06 19:19:07,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:07,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029374123] [2019-11-06 19:19:07,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:07,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029374123] [2019-11-06 19:19:07,821 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141377517] [2019-11-06 19:19:07,821 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 19:19:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:07,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 19:19:08,097 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:08,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:19:08,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311507588] [2019-11-06 19:19:08,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:08,104 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:08,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:08,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:08,106 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-11-06 19:19:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:11,723 INFO L93 Difference]: Finished difference Result 3133 states and 5148 transitions. [2019-11-06 19:19:11,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:11,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2019-11-06 19:19:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:11,742 INFO L225 Difference]: With dead ends: 3133 [2019-11-06 19:19:11,742 INFO L226 Difference]: Without dead ends: 2108 [2019-11-06 19:19:11,748 INFO L630 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 [2019-11-06 19:19:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-11-06 19:19:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2078. [2019-11-06 19:19:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-11-06 19:19:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-11-06 19:19:11,858 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 236 [2019-11-06 19:19:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:11,861 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-11-06 19:19:11,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-11-06 19:19:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-11-06 19:19:11,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:11,873 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, 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] [2019-11-06 19:19:12,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:12,078 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1631884023, now seen corresponding path program 1 times [2019-11-06 19:19:12,079 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:12,080 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148415712] [2019-11-06 19:19:12,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 124 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:12,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148415712] [2019-11-06 19:19:12,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377792070] [2019-11-06 19:19:12,379 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 19:19:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:12,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 19:19:12,546 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:12,546 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:12,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154070163] [2019-11-06 19:19:12,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:12,547 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:12,548 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-11-06 19:19:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:15,402 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-11-06 19:19:15,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:15,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-11-06 19:19:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:15,436 INFO L225 Difference]: With dead ends: 6302 [2019-11-06 19:19:15,436 INFO L226 Difference]: Without dead ends: 4230 [2019-11-06 19:19:15,443 INFO L630 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 [2019-11-06 19:19:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-11-06 19:19:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-11-06 19:19:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-11-06 19:19:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5870 transitions. [2019-11-06 19:19:15,581 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5870 transitions. Word has length 240 [2019-11-06 19:19:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:15,584 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5870 transitions. [2019-11-06 19:19:15,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5870 transitions. [2019-11-06 19:19:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-11-06 19:19:15,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:15,592 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, 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] [2019-11-06 19:19:15,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:15,797 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1814388998, now seen corresponding path program 1 times [2019-11-06 19:19:15,799 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:15,799 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894794773] [2019-11-06 19:19:15,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 267 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:19:16,211 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894794773] [2019-11-06 19:19:16,211 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463801464] [2019-11-06 19:19:16,211 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 19:19:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:16,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 19:19:16,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:16,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:19:16,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141929024] [2019-11-06 19:19:16,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:16,439 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:16,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:16,440 INFO L87 Difference]: Start difference. First operand 4208 states and 5870 transitions. Second operand 11 states. [2019-11-06 19:19:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:21,211 INFO L93 Difference]: Finished difference Result 10864 states and 15773 transitions. [2019-11-06 19:19:21,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:21,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 335 [2019-11-06 19:19:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:21,244 INFO L225 Difference]: With dead ends: 10864 [2019-11-06 19:19:21,244 INFO L226 Difference]: Without dead ends: 6662 [2019-11-06 19:19:21,257 INFO L630 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 [2019-11-06 19:19:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-11-06 19:19:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 5269. [2019-11-06 19:19:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5269 states. [2019-11-06 19:19:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5269 states to 5269 states and 7276 transitions. [2019-11-06 19:19:21,403 INFO L78 Accepts]: Start accepts. Automaton has 5269 states and 7276 transitions. Word has length 335 [2019-11-06 19:19:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:21,404 INFO L462 AbstractCegarLoop]: Abstraction has 5269 states and 7276 transitions. [2019-11-06 19:19:21,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5269 states and 7276 transitions. [2019-11-06 19:19:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2019-11-06 19:19:21,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:21,415 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, 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] [2019-11-06 19:19:21,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:21,618 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash 306583982, now seen corresponding path program 1 times [2019-11-06 19:19:21,620 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:21,620 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336871707] [2019-11-06 19:19:21,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 186 proven. 197 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:19:22,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336871707] [2019-11-06 19:19:22,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428103943] [2019-11-06 19:19:22,182 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 19:19:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:22,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:22,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-11-06 19:19:22,598 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:22,598 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:22,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027604720] [2019-11-06 19:19:22,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:22,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:22,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:22,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:22,601 INFO L87 Difference]: Start difference. First operand 5269 states and 7276 transitions. Second operand 5 states. [2019-11-06 19:19:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:26,391 INFO L93 Difference]: Finished difference Result 11933 states and 16530 transitions. [2019-11-06 19:19:26,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:19:26,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2019-11-06 19:19:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:26,421 INFO L225 Difference]: With dead ends: 11933 [2019-11-06 19:19:26,422 INFO L226 Difference]: Without dead ends: 6670 [2019-11-06 19:19:26,437 INFO L630 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 [2019-11-06 19:19:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2019-11-06 19:19:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 6646. [2019-11-06 19:19:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6646 states. [2019-11-06 19:19:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 8452 transitions. [2019-11-06 19:19:26,587 INFO L78 Accepts]: Start accepts. Automaton has 6646 states and 8452 transitions. Word has length 411 [2019-11-06 19:19:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:26,588 INFO L462 AbstractCegarLoop]: Abstraction has 6646 states and 8452 transitions. [2019-11-06 19:19:26,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 6646 states and 8452 transitions. [2019-11-06 19:19:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2019-11-06 19:19:26,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:26,604 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, 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] [2019-11-06 19:19:26,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:26,807 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash 665499114, now seen corresponding path program 1 times [2019-11-06 19:19:26,808 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:26,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650751636] [2019-11-06 19:19:26,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 302 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 19:19:27,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650751636] [2019-11-06 19:19:27,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160045309] [2019-11-06 19:19:27,712 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 19:19:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:27,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 420 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 19:19:28,207 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:28,207 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:28,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730237457] [2019-11-06 19:19:28,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:28,210 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:28,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:28,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:28,211 INFO L87 Difference]: Start difference. First operand 6646 states and 8452 transitions. Second operand 11 states.