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/Problem15_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:32,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:32,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:32,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:03:32,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:03:32,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:03:32,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:03:32,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:03:32,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:03:32,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:03:32,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:03:32,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:03:32,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:32,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:32,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:32,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:32,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:32,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:32,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:32,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:32,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:32,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:32,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:32,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:32,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:32,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:03:32,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:03:32,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:03:32,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:03:32,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:03:32,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:03:32,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:03:32,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:03:32,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:32,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:32,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:32,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:03:32,207 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:32,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:32,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:32,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:32,209 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:32,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:32,209 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:32,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:32,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:32,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:32,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:32,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:32,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:32,210 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:32,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:32,211 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:32,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:32,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:32,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:32,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:32,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:32,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:32,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:32,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:32,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:32,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:32,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:32,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:32,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:32,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:32,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:32,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:32,515 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:32,515 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:32,516 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-10-14 22:03:32,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df86c629/3ebae624966a4f9aab23688f6fb6c9f0/FLAG278e4d762 [2019-10-14 22:03:33,272 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:33,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-10-14 22:03:33,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df86c629/3ebae624966a4f9aab23688f6fb6c9f0/FLAG278e4d762 [2019-10-14 22:03:33,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df86c629/3ebae624966a4f9aab23688f6fb6c9f0 [2019-10-14 22:03:33,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:33,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:33,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:33,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:33,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:33,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:33" (1/1) ... [2019-10-14 22:03:33,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9aa9a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:33, skipping insertion in model container [2019-10-14 22:03:33,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:33" (1/1) ... [2019-10-14 22:03:33,470 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:33,561 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:34,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:34,491 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:34,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:34,877 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:34,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34 WrapperNode [2019-10-14 22:03:34,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:34,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:34,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:34,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:34,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... [2019-10-14 22:03:34,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... [2019-10-14 22:03:34,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... [2019-10-14 22:03:34,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... [2019-10-14 22:03:35,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... [2019-10-14 22:03:35,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... [2019-10-14 22:03:35,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... [2019-10-14 22:03:35,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:35,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:35,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:35,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:35,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:03:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:03:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:03:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:03:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:03:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:03:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:03:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:03:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:03:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:03:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:03:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:03:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:03:38,832 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:03:38,832 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:03:38,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:38 BoogieIcfgContainer [2019-10-14 22:03:38,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:03:38,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:03:38,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:03:38,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:03:38,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:33" (1/3) ... [2019-10-14 22:03:38,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58863d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:38, skipping insertion in model container [2019-10-14 22:03:38,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:34" (2/3) ... [2019-10-14 22:03:38,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58863d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:38, skipping insertion in model container [2019-10-14 22:03:38,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:38" (3/3) ... [2019-10-14 22:03:38,845 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label55.c [2019-10-14 22:03:38,855 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:03:38,864 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:03:38,875 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:03:38,905 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:03:38,905 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:03:38,906 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:03:38,906 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:03:38,906 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:03:38,906 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:03:38,906 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:03:38,906 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:03:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:03:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 22:03:38,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:38,947 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:38,949 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash 567183525, now seen corresponding path program 1 times [2019-10-14 22:03:38,962 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:38,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326181884] [2019-10-14 22:03:38,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:38,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:38,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:39,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326181884] [2019-10-14 22:03:39,357 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:39,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:03:39,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535854683] [2019-10-14 22:03:39,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:39,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:03:39,380 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:03:46,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:46,148 INFO L93 Difference]: Finished difference Result 1513 states and 2781 transitions. [2019-10-14 22:03:46,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:46,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-14 22:03:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:46,184 INFO L225 Difference]: With dead ends: 1513 [2019-10-14 22:03:46,184 INFO L226 Difference]: Without dead ends: 1007 [2019-10-14 22:03:46,198 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2019-10-14 22:03:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 999. [2019-10-14 22:03:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2019-10-14 22:03:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1377 transitions. [2019-10-14 22:03:46,327 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1377 transitions. Word has length 63 [2019-10-14 22:03:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:46,328 INFO L462 AbstractCegarLoop]: Abstraction has 999 states and 1377 transitions. [2019-10-14 22:03:46,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1377 transitions. [2019-10-14 22:03:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 22:03:46,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:46,335 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:03:46,335 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 550015554, now seen corresponding path program 1 times [2019-10-14 22:03:46,337 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:46,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161629214] [2019-10-14 22:03:46,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:46,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:46,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:46,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161629214] [2019-10-14 22:03:46,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479773777] [2019-10-14 22:03:46,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:46,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:46,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:46,756 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:46,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:46,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682546778] [2019-10-14 22:03:46,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:46,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:46,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:46,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:46,761 INFO L87 Difference]: Start difference. First operand 999 states and 1377 transitions. Second operand 3 states. [2019-10-14 22:03:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:49,843 INFO L93 Difference]: Finished difference Result 2620 states and 3685 transitions. [2019-10-14 22:03:49,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:49,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-14 22:03:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:49,853 INFO L225 Difference]: With dead ends: 2620 [2019-10-14 22:03:49,853 INFO L226 Difference]: Without dead ends: 1627 [2019-10-14 22:03:49,856 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2019-10-14 22:03:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1625. [2019-10-14 22:03:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1625 states. [2019-10-14 22:03:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2077 transitions. [2019-10-14 22:03:49,900 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2077 transitions. Word has length 132 [2019-10-14 22:03:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:49,901 INFO L462 AbstractCegarLoop]: Abstraction has 1625 states and 2077 transitions. [2019-10-14 22:03:49,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2077 transitions. [2019-10-14 22:03:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-14 22:03:49,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:49,908 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:03:50,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:50,114 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2042933374, now seen corresponding path program 1 times [2019-10-14 22:03:50,116 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:50,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686219938] [2019-10-14 22:03:50,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:50,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:50,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 113 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:03:50,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686219938] [2019-10-14 22:03:50,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580496192] [2019-10-14 22:03:50,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 22:03:50,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 22:03:50,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:50,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-10-14 22:03:50,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704069037] [2019-10-14 22:03:50,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 22:03:50,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:50,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 22:03:50,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:03:50,928 INFO L87 Difference]: Start difference. First operand 1625 states and 2077 transitions. Second operand 13 states. [2019-10-14 22:04:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:09,135 INFO L93 Difference]: Finished difference Result 8760 states and 11769 transitions. [2019-10-14 22:04:09,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-10-14 22:04:09,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 237 [2019-10-14 22:04:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:09,174 INFO L225 Difference]: With dead ends: 8760 [2019-10-14 22:04:09,174 INFO L226 Difference]: Without dead ends: 7141 [2019-10-14 22:04:09,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=3742, Unknown=0, NotChecked=0, Total=4422 [2019-10-14 22:04:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2019-10-14 22:04:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 7027. [2019-10-14 22:04:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7027 states. [2019-10-14 22:04:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7027 states to 7027 states and 8358 transitions. [2019-10-14 22:04:09,391 INFO L78 Accepts]: Start accepts. Automaton has 7027 states and 8358 transitions. Word has length 237 [2019-10-14 22:04:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:09,392 INFO L462 AbstractCegarLoop]: Abstraction has 7027 states and 8358 transitions. [2019-10-14 22:04:09,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 22:04:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 7027 states and 8358 transitions. [2019-10-14 22:04:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-14 22:04:09,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:09,403 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:09,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:09,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -602814724, now seen corresponding path program 1 times [2019-10-14 22:04:09,609 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:09,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25388042] [2019-10-14 22:04:09,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:09,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:09,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:04:10,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25388042] [2019-10-14 22:04:10,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617972651] [2019-10-14 22:04:10,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:10,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:10,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:04:10,413 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:10,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:04:10,413 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253172815] [2019-10-14 22:04:10,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:04:10,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:04:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:10,415 INFO L87 Difference]: Start difference. First operand 7027 states and 8358 transitions. Second operand 3 states. [2019-10-14 22:04:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:12,736 INFO L93 Difference]: Finished difference Result 16233 states and 19879 transitions. [2019-10-14 22:04:12,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:04:12,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2019-10-14 22:04:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:12,784 INFO L225 Difference]: With dead ends: 16233 [2019-10-14 22:04:12,785 INFO L226 Difference]: Without dead ends: 9519 [2019-10-14 22:04:12,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9519 states. [2019-10-14 22:04:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9519 to 8903. [2019-10-14 22:04:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8903 states. [2019-10-14 22:04:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 10907 transitions. [2019-10-14 22:04:13,012 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 10907 transitions. Word has length 343 [2019-10-14 22:04:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:13,015 INFO L462 AbstractCegarLoop]: Abstraction has 8903 states and 10907 transitions. [2019-10-14 22:04:13,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:04:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 10907 transitions. [2019-10-14 22:04:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2019-10-14 22:04:13,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:13,028 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:04:13,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:13,232 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1058972922, now seen corresponding path program 1 times [2019-10-14 22:04:13,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:13,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435828134] [2019-10-14 22:04:13,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:13,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:13,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat