/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:15:47,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:15:47,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:15:47,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:15:47,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:15:47,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:15:47,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:15:47,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:15:47,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:15:47,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:15:47,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:15:47,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:15:47,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:15:47,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:15:47,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:15:47,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:15:47,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:15:47,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:15:47,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:15:47,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:15:47,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:15:47,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:15:47,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:15:47,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:15:47,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:15:47,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:15:47,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:15:47,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:15:47,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:15:47,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:15:47,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:15:47,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:15:47,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:15:47,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:15:47,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:15:47,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:15:47,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:15:47,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:15:47,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:15:47,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:15:47,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:15:47,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:15:47,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:15:47,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:15:47,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:15:47,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:15:47,245 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:15:47,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:15:47,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:15:47,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:15:47,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:15:47,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:15:47,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:15:47,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:15:47,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:15:47,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:15:47,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:15:47,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:15:47,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:15:47,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:15:47,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:15:47,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:15:47,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:15:47,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:15:47,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:15:47,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:15:47,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:15:47,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:15:47,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:15:47,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:15:47,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:15:47,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:15:47,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:15:47,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:15:47,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:15:47,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:15:47,593 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:15:47,594 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 21:15:47,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d9d0d3ef/1004cb54506447b8a38fafcf06e0a5ae/FLAGac4f9b1d7 [2020-08-18 21:15:48,195 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:15:48,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 21:15:48,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d9d0d3ef/1004cb54506447b8a38fafcf06e0a5ae/FLAGac4f9b1d7 [2020-08-18 21:15:48,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d9d0d3ef/1004cb54506447b8a38fafcf06e0a5ae [2020-08-18 21:15:48,528 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:15:48,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:15:48,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:15:48,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:15:48,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:15:48,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7798a6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48, skipping insertion in model container [2020-08-18 21:15:48,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:15:48,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:15:48,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:15:48,775 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:15:48,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:15:48,832 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:15:48,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48 WrapperNode [2020-08-18 21:15:48,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:15:48,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:15:48,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:15:48,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:15:48,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... [2020-08-18 21:15:48,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:15:48,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:15:48,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:15:48,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:15:48,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 21:15:49,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:15:49,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:15:49,039 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 21:15:49,039 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 21:15:49,039 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 21:15:49,039 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 21:15:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 21:15:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 21:15:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 21:15:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 21:15:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 21:15:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 21:15:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 21:15:49,041 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 21:15:49,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:15:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:15:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:15:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 21:15:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 21:15:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 21:15:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 21:15:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 21:15:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 21:15:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 21:15:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 21:15:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 21:15:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 21:15:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 21:15:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 21:15:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:15:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:15:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:15:49,440 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:15:49,441 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 21:15:49,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:15:49 BoogieIcfgContainer [2020-08-18 21:15:49,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:15:49,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:15:49,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:15:49,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:15:49,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:15:48" (1/3) ... [2020-08-18 21:15:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72372b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:15:49, skipping insertion in model container [2020-08-18 21:15:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:48" (2/3) ... [2020-08-18 21:15:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72372b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:15:49, skipping insertion in model container [2020-08-18 21:15:49,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:15:49" (3/3) ... [2020-08-18 21:15:49,457 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-18 21:15:49,468 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:15:49,485 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:15:49,509 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:15:49,550 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:15:49,551 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:15:49,551 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:15:49,551 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:15:49,551 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:15:49,552 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:15:49,552 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:15:49,552 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:15:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-18 21:15:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 21:15:49,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:49,585 INFO L422 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] [2020-08-18 21:15:49,586 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-18 21:15:49,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:49,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234015848] [2020-08-18 21:15:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:49,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:50,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:15:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:50,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:15:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:50,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:15:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:50,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:15:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:50,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:15:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:50,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:15:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:50,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234015848] [2020-08-18 21:15:50,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:50,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:15:50,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797165095] [2020-08-18 21:15:50,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:15:50,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:15:50,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:15:50,135 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-18 21:15:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:51,345 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-18 21:15:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:15:51,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-18 21:15:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:51,385 INFO L225 Difference]: With dead ends: 356 [2020-08-18 21:15:51,385 INFO L226 Difference]: Without dead ends: 248 [2020-08-18 21:15:51,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:15:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-18 21:15:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-18 21:15:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 21:15:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-18 21:15:51,491 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-18 21:15:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:51,492 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-18 21:15:51,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:15:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-18 21:15:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 21:15:51,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:51,498 INFO L422 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] [2020-08-18 21:15:51,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:15:51,499 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-18 21:15:51,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:51,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683292935] [2020-08-18 21:15:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:15:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:15:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:15:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:15:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:15:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:15:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:51,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683292935] [2020-08-18 21:15:51,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:51,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:15:51,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466625299] [2020-08-18 21:15:51,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:15:51,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:51,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:15:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:15:51,747 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-18 21:15:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:52,406 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-18 21:15:52,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:15:52,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-18 21:15:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:52,411 INFO L225 Difference]: With dead ends: 406 [2020-08-18 21:15:52,411 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 21:15:52,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:15:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 21:15:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-18 21:15:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 21:15:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-18 21:15:52,450 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-18 21:15:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:52,451 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-18 21:15:52,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:15:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-18 21:15:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 21:15:52,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:52,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:52,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:15:52,455 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:52,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:52,456 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-18 21:15:52,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:52,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191454600] [2020-08-18 21:15:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:15:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:15:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:15:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:15:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 21:15:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:15:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:15:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:52,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191454600] [2020-08-18 21:15:52,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:52,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:15:52,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044022909] [2020-08-18 21:15:52,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:15:52,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:52,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:15:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:15:52,730 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-18 21:15:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:54,035 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-18 21:15:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:15:54,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-18 21:15:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:54,040 INFO L225 Difference]: With dead ends: 582 [2020-08-18 21:15:54,040 INFO L226 Difference]: Without dead ends: 417 [2020-08-18 21:15:54,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-18 21:15:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-18 21:15:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-18 21:15:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-18 21:15:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-18 21:15:54,099 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-18 21:15:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:54,100 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-18 21:15:54,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:15:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-18 21:15:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 21:15:54,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:54,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:54,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:15:54,106 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:54,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-18 21:15:54,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:54,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590807048] [2020-08-18 21:15:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:15:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:15:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:15:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:15:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:15:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:15:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:15:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:54,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590807048] [2020-08-18 21:15:54,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:54,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 21:15:54,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706849845] [2020-08-18 21:15:54,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:15:54,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:15:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:15:54,400 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-18 21:15:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:57,374 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-18 21:15:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 21:15:57,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-18 21:15:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:57,382 INFO L225 Difference]: With dead ends: 873 [2020-08-18 21:15:57,382 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 21:15:57,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 21:15:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 21:15:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-18 21:15:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-18 21:15:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-18 21:15:57,461 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-18 21:15:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:57,464 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-18 21:15:57,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:15:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-18 21:15:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 21:15:57,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:57,468 INFO L422 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] [2020-08-18 21:15:57,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:15:57,478 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-18 21:15:57,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:57,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923325296] [2020-08-18 21:15:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:15:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:15:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:15:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:15:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:15:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:15:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:57,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923325296] [2020-08-18 21:15:57,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:57,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:15:57,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508269112] [2020-08-18 21:15:57,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:15:57,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:57,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:15:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:15:57,755 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-18 21:15:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:58,937 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-18 21:15:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:15:58,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-18 21:15:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:58,943 INFO L225 Difference]: With dead ends: 612 [2020-08-18 21:15:58,943 INFO L226 Difference]: Without dead ends: 418 [2020-08-18 21:15:58,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:15:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-18 21:15:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-18 21:15:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 21:15:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-18 21:15:58,989 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-18 21:15:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:58,989 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-18 21:15:58,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:15:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-18 21:15:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 21:15:58,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:58,991 INFO L422 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] [2020-08-18 21:15:58,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:15:58,992 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-18 21:15:58,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:58,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991455541] [2020-08-18 21:15:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:15:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:15:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:15:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:15:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:15:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:15:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:59,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991455541] [2020-08-18 21:15:59,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:59,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:15:59,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960939153] [2020-08-18 21:15:59,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:15:59,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:15:59,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:15:59,178 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-18 21:16:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:00,094 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-18 21:16:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:16:00,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 21:16:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:00,100 INFO L225 Difference]: With dead ends: 727 [2020-08-18 21:16:00,100 INFO L226 Difference]: Without dead ends: 421 [2020-08-18 21:16:00,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:16:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-18 21:16:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-18 21:16:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-18 21:16:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-18 21:16:00,158 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-18 21:16:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:00,160 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-18 21:16:00,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:16:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-18 21:16:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 21:16:00,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:00,162 INFO L422 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] [2020-08-18 21:16:00,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:16:00,162 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-18 21:16:00,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:00,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125493952] [2020-08-18 21:16:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:16:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:16:00,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125493952] [2020-08-18 21:16:00,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:16:00,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:16:00,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258029293] [2020-08-18 21:16:00,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:16:00,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:16:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:16:00,395 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-18 21:16:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:02,911 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-18 21:16:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 21:16:02,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 21:16:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:02,921 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 21:16:02,921 INFO L226 Difference]: Without dead ends: 840 [2020-08-18 21:16:02,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-18 21:16:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-18 21:16:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-18 21:16:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-18 21:16:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-18 21:16:03,020 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-18 21:16:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:03,021 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-18 21:16:03,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:16:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-18 21:16:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 21:16:03,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:03,023 INFO L422 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] [2020-08-18 21:16:03,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:16:03,024 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-18 21:16:03,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:03,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312491632] [2020-08-18 21:16:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:16:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:16:03,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312491632] [2020-08-18 21:16:03,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:16:03,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:16:03,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454411149] [2020-08-18 21:16:03,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:16:03,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:16:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:16:03,191 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-18 21:16:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:04,107 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-18 21:16:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:16:04,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 21:16:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:04,114 INFO L225 Difference]: With dead ends: 1352 [2020-08-18 21:16:04,114 INFO L226 Difference]: Without dead ends: 764 [2020-08-18 21:16:04,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:16:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-18 21:16:04,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-18 21:16:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-18 21:16:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-18 21:16:04,186 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-18 21:16:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:04,186 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-18 21:16:04,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:16:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-18 21:16:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 21:16:04,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:04,188 INFO L422 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] [2020-08-18 21:16:04,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:16:04,188 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-18 21:16:04,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:04,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362709021] [2020-08-18 21:16:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:16:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:16:04,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362709021] [2020-08-18 21:16:04,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:16:04,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:16:04,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562246012] [2020-08-18 21:16:04,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:16:04,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:16:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:16:04,338 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-18 21:16:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:04,997 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-18 21:16:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:16:04,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-18 21:16:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:05,003 INFO L225 Difference]: With dead ends: 1262 [2020-08-18 21:16:05,004 INFO L226 Difference]: Without dead ends: 814 [2020-08-18 21:16:05,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:16:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-18 21:16:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-18 21:16:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-18 21:16:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-18 21:16:05,081 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-18 21:16:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:05,082 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-18 21:16:05,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:16:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-18 21:16:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 21:16:05,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:05,084 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 21:16:05,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:16:05,084 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-18 21:16:05,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:05,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878586338] [2020-08-18 21:16:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 21:16:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 21:16:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 21:16:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 21:16:05,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878586338] [2020-08-18 21:16:05,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:16:05,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:16:05,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342741218] [2020-08-18 21:16:05,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:16:05,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:05,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:16:05,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:16:05,327 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-18 21:16:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:07,919 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-18 21:16:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 21:16:07,919 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-18 21:16:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:07,928 INFO L225 Difference]: With dead ends: 2276 [2020-08-18 21:16:07,928 INFO L226 Difference]: Without dead ends: 1165 [2020-08-18 21:16:07,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 21:16:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-18 21:16:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-18 21:16:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-18 21:16:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-18 21:16:08,047 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-18 21:16:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:08,048 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-18 21:16:08,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:16:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-18 21:16:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 21:16:08,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:08,057 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 21:16:08,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:16:08,057 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-18 21:16:08,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:08,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512798165] [2020-08-18 21:16:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:16:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 21:16:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 21:16:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 21:16:08,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512798165] [2020-08-18 21:16:08,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:16:08,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:16:08,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711663642] [2020-08-18 21:16:08,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:16:08,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:08,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:16:08,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:16:08,234 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-18 21:16:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:09,120 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-18 21:16:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:16:09,121 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-18 21:16:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:09,131 INFO L225 Difference]: With dead ends: 1198 [2020-08-18 21:16:09,131 INFO L226 Difference]: Without dead ends: 1195 [2020-08-18 21:16:09,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:16:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-18 21:16:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-18 21:16:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-18 21:16:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-18 21:16:09,246 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-18 21:16:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:09,247 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-18 21:16:09,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:16:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-18 21:16:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 21:16:09,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:09,251 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 21:16:09,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:16:09,251 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:09,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-18 21:16:09,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:09,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938745017] [2020-08-18 21:16:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:16:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 21:16:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 21:16:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 21:16:09,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938745017] [2020-08-18 21:16:09,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:16:09,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:16:09,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749731102] [2020-08-18 21:16:09,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:16:09,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:09,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:16:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:16:09,526 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-18 21:16:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:11,841 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-18 21:16:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 21:16:11,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-18 21:16:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:11,858 INFO L225 Difference]: With dead ends: 2245 [2020-08-18 21:16:11,858 INFO L226 Difference]: Without dead ends: 2242 [2020-08-18 21:16:11,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-18 21:16:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-18 21:16:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-18 21:16:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-18 21:16:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-18 21:16:12,136 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-18 21:16:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:12,136 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-18 21:16:12,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:16:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-18 21:16:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-18 21:16:12,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:12,145 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:16:12,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:16:12,145 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-18 21:16:12,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:12,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309588425] [2020-08-18 21:16:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:16:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 21:16:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:16:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 21:16:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-18 21:16:12,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309588425] [2020-08-18 21:16:12,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:16:12,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:16:12,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788160068] [2020-08-18 21:16:12,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:16:12,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:16:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:16:12,332 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-18 21:16:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:13,256 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-18 21:16:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:16:13,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-18 21:16:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:13,271 INFO L225 Difference]: With dead ends: 3453 [2020-08-18 21:16:13,271 INFO L226 Difference]: Without dead ends: 1708 [2020-08-18 21:16:13,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:16:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-18 21:16:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-18 21:16:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-18 21:16:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-18 21:16:13,511 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-18 21:16:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:13,512 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-18 21:16:13,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:16:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-18 21:16:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 21:16:13,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:16:13,520 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 21:16:13,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:16:13,520 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:16:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:16:13,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-18 21:16:13,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:16:13,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885242067] [2020-08-18 21:16:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:16:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:16:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:16:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:16:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:16:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:16:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 21:16:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 21:16:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 21:16:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:16:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-18 21:16:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:16:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:16:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:16:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-18 21:16:13,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885242067] [2020-08-18 21:16:13,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:16:13,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:16:13,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901459824] [2020-08-18 21:16:13,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:16:13,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:16:13,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:16:13,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:16:13,774 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-18 21:16:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:16:15,343 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-18 21:16:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 21:16:15,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-18 21:16:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:16:15,346 INFO L225 Difference]: With dead ends: 1974 [2020-08-18 21:16:15,346 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:16:15,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-18 21:16:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:16:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:16:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:16:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:16:15,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-18 21:16:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:16:15,360 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:16:15,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:16:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:16:15,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:16:15,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:16:15,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:16:15,898 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-18 21:16:20,283 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 140 [2020-08-18 21:16:23,080 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 21:16:24,191 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 21:16:25,400 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 21:16:25,681 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-18 21:16:25,802 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 21:16:26,867 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-18 21:16:27,059 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 21:16:28,392 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-18 21:16:29,212 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-18 21:16:30,072 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-18 21:16:30,486 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-18 21:16:31,575 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 21:16:31,701 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-18 21:16:31,846 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 21:16:35,080 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-18 21:16:35,264 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-18 21:16:35,832 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-18 21:16:36,206 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-18 21:16:36,538 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 21:16:36,730 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 21:16:41,047 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-18 21:16:41,201 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-18 21:16:43,260 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-18 21:16:44,443 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-18 21:16:45,846 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-18 21:16:46,038 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46