/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 15:04:41,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:04:41,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:04:41,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:04:41,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:04:41,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:04:41,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:04:41,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:04:41,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:04:41,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:04:41,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:04:41,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:04:41,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:04:41,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:04:41,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:04:41,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:04:41,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:04:41,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:04:41,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:04:41,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:04:41,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:04:41,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:04:41,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:04:41,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:04:41,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:04:41,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:04:41,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:04:41,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:04:41,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:04:41,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:04:41,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:04:41,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:04:41,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:04:41,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:04:41,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:04:41,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:04:41,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:04:41,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:04:41,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:04:41,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:04:41,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:04:41,175 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 [2020-08-21 15:04:41,197 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:04:41,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:04:41,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:04:41,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:04:41,199 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:04:41,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:04:41,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:04:41,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:04:41,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:04:41,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:04:41,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:04:41,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:04:41,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:04:41,201 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:04:41,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:04:41,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:04:41,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:04:41,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:04:41,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:04:41,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:04:41,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:04:41,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:04:41,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:04:41,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:04:41,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:04:41,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:04:41,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:04:41,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:04:41,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:04:41,204 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:04:41,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:04:41,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:04:41,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:04:41,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:04:41,513 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:04:41,515 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 15:04:41,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdd7784f9/541a39e750ed4fb78e2ec7e1f594bccd/FLAGf26fdd5cc [2020-08-21 15:04:42,062 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:04:42,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 15:04:42,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdd7784f9/541a39e750ed4fb78e2ec7e1f594bccd/FLAGf26fdd5cc [2020-08-21 15:04:42,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdd7784f9/541a39e750ed4fb78e2ec7e1f594bccd [2020-08-21 15:04:42,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:04:42,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:04:42,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:42,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:04:42,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:04:42,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780fc4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42, skipping insertion in model container [2020-08-21 15:04:42,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:04:42,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:04:42,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:42,774 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:04:42,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:42,938 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:04:42,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42 WrapperNode [2020-08-21 15:04:42,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:42,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:04:42,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:04:42,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:04:42,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (1/1) ... [2020-08-21 15:04:42,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:04:42,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:04:42,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:04:42,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:04:42,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (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 [2020-08-21 15:04:43,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:04:43,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:04:43,043 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 15:04:43,043 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 15:04:43,043 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 15:04:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 15:04:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 15:04:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 15:04:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 15:04:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 15:04:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 15:04:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 15:04:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 15:04:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 15:04:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:04:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:04:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:04:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 15:04:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 15:04:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 15:04:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 15:04:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 15:04:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 15:04:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 15:04:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 15:04:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 15:04:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 15:04:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 15:04:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 15:04:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:04:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:04:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:04:43,429 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:04:43,429 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 15:04:43,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:43 BoogieIcfgContainer [2020-08-21 15:04:43,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:04:43,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:04:43,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:04:43,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:04:43,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:04:42" (1/3) ... [2020-08-21 15:04:43,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204a59a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:43, skipping insertion in model container [2020-08-21 15:04:43,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:42" (2/3) ... [2020-08-21 15:04:43,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204a59a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:43, skipping insertion in model container [2020-08-21 15:04:43,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:43" (3/3) ... [2020-08-21 15:04:43,454 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-21 15:04:43,463 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:04:43,476 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:04:43,490 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:04:43,519 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:04:43,519 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:04:43,519 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:04:43,519 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:04:43,519 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:04:43,519 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:04:43,519 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:04:43,520 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:04:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-21 15:04:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 15:04:43,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:43,551 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] [2020-08-21 15:04:43,551 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:43,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:43,556 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-21 15:04:43,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:43,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094971824] [2020-08-21 15:04:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:43,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:43,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 15:04:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:44,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094971824] [2020-08-21 15:04:44,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:44,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:04:44,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518825696] [2020-08-21 15:04:44,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:04:44,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:04:44,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:04:44,134 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-21 15:04:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:45,276 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-21 15:04:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:04:45,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 15:04:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:45,308 INFO L225 Difference]: With dead ends: 356 [2020-08-21 15:04:45,308 INFO L226 Difference]: Without dead ends: 248 [2020-08-21 15:04:45,318 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 [2020-08-21 15:04:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-21 15:04:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-21 15:04:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 15:04:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-21 15:04:45,418 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-21 15:04:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:45,419 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-21 15:04:45,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:04:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-21 15:04:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 15:04:45,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:45,424 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] [2020-08-21 15:04:45,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:04:45,425 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-21 15:04:45,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:45,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740439894] [2020-08-21 15:04:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 15:04:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:45,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740439894] [2020-08-21 15:04:45,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:45,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:04:45,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853715850] [2020-08-21 15:04:45,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:04:45,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:04:45,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:04:45,631 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-21 15:04:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:46,236 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-21 15:04:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:04:46,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-21 15:04:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:46,240 INFO L225 Difference]: With dead ends: 406 [2020-08-21 15:04:46,240 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 15:04:46,242 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 [2020-08-21 15:04:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 15:04:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-21 15:04:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 15:04:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-21 15:04:46,277 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-21 15:04:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:46,277 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-21 15:04:46,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:04:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-21 15:04:46,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 15:04:46,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:46,282 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] [2020-08-21 15:04:46,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:04:46,282 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-21 15:04:46,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:46,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731882038] [2020-08-21 15:04:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 15:04:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 15:04:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:46,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731882038] [2020-08-21 15:04:46,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:46,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:04:46,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000329466] [2020-08-21 15:04:46,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:04:46,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:04:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:46,545 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-21 15:04:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:47,676 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-21 15:04:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 15:04:47,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-21 15:04:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:47,685 INFO L225 Difference]: With dead ends: 582 [2020-08-21 15:04:47,685 INFO L226 Difference]: Without dead ends: 417 [2020-08-21 15:04:47,689 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 [2020-08-21 15:04:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-21 15:04:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-21 15:04:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-21 15:04:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-21 15:04:47,757 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-21 15:04:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:47,758 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-21 15:04:47,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:04:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-21 15:04:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 15:04:47,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:47,762 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] [2020-08-21 15:04:47,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:04:47,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-21 15:04:47,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:47,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073397505] [2020-08-21 15:04:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 15:04:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 15:04:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:47,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:48,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073397505] [2020-08-21 15:04:48,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:48,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 15:04:48,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094621101] [2020-08-21 15:04:48,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 15:04:48,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 15:04:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:04:48,011 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-21 15:04:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:50,826 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-21 15:04:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 15:04:50,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-21 15:04:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:50,836 INFO L225 Difference]: With dead ends: 873 [2020-08-21 15:04:50,837 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 15:04:50,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 15:04:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 15:04:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-21 15:04:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 15:04:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 15:04:50,919 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-21 15:04:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:50,919 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 15:04:50,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 15:04:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 15:04:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 15:04:50,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:50,922 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] [2020-08-21 15:04:50,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:04:50,931 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-21 15:04:50,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:50,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762991888] [2020-08-21 15:04:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 15:04:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:51,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762991888] [2020-08-21 15:04:51,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:51,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:04:51,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317776866] [2020-08-21 15:04:51,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:04:51,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:51,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:04:51,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:04:51,238 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-21 15:04:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:52,359 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-21 15:04:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:04:52,359 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-21 15:04:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:52,363 INFO L225 Difference]: With dead ends: 612 [2020-08-21 15:04:52,363 INFO L226 Difference]: Without dead ends: 418 [2020-08-21 15:04:52,365 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 [2020-08-21 15:04:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-21 15:04:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-21 15:04:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 15:04:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-21 15:04:52,403 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-21 15:04:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:52,404 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-21 15:04:52,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:04:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-21 15:04:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 15:04:52,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:52,405 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] [2020-08-21 15:04:52,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:04:52,406 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-21 15:04:52,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:52,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321721401] [2020-08-21 15:04:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 15:04:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:52,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321721401] [2020-08-21 15:04:52,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:52,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:04:52,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871669087] [2020-08-21 15:04:52,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:04:52,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:52,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:04:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:52,570 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-21 15:04:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:53,381 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-21 15:04:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:04:53,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 15:04:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:53,386 INFO L225 Difference]: With dead ends: 727 [2020-08-21 15:04:53,387 INFO L226 Difference]: Without dead ends: 421 [2020-08-21 15:04:53,390 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 [2020-08-21 15:04:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-21 15:04:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-21 15:04:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-21 15:04:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-21 15:04:53,478 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-21 15:04:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:53,478 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-21 15:04:53,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:04:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-21 15:04:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 15:04:53,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:53,479 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] [2020-08-21 15:04:53,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:04:53,480 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-21 15:04:53,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:53,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019205141] [2020-08-21 15:04:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 15:04:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:53,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019205141] [2020-08-21 15:04:53,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:53,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:04:53,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416548342] [2020-08-21 15:04:53,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:04:53,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:04:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:53,709 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-21 15:04:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:56,213 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-21 15:04:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 15:04:56,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 15:04:56,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:56,219 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 15:04:56,219 INFO L226 Difference]: Without dead ends: 840 [2020-08-21 15:04:56,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-21 15:04:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-21 15:04:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-21 15:04:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-21 15:04:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-21 15:04:56,305 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-21 15:04:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:56,307 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-21 15:04:56,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:04:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-21 15:04:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 15:04:56,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:56,308 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] [2020-08-21 15:04:56,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:04:56,309 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-21 15:04:56,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:56,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240687194] [2020-08-21 15:04:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 15:04:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:56,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240687194] [2020-08-21 15:04:56,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:56,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:04:56,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942335063] [2020-08-21 15:04:56,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:04:56,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:56,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:04:56,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:56,509 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-21 15:04:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:57,331 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-21 15:04:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:04:57,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 15:04:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:57,337 INFO L225 Difference]: With dead ends: 1352 [2020-08-21 15:04:57,337 INFO L226 Difference]: Without dead ends: 764 [2020-08-21 15:04:57,340 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 [2020-08-21 15:04:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-21 15:04:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-21 15:04:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-21 15:04:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-21 15:04:57,412 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-21 15:04:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:57,412 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-21 15:04:57,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:04:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-21 15:04:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 15:04:57,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:57,414 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] [2020-08-21 15:04:57,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:04:57,414 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:57,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-21 15:04:57,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:57,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837639355] [2020-08-21 15:04:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 15:04:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:57,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837639355] [2020-08-21 15:04:57,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:57,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:04:57,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059791567] [2020-08-21 15:04:57,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:04:57,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:04:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:04:57,532 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-21 15:04:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:58,228 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-21 15:04:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:04:58,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-21 15:04:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:58,234 INFO L225 Difference]: With dead ends: 1262 [2020-08-21 15:04:58,234 INFO L226 Difference]: Without dead ends: 814 [2020-08-21 15:04:58,237 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 [2020-08-21 15:04:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-21 15:04:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-21 15:04:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-21 15:04:58,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-21 15:04:58,316 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-21 15:04:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:58,316 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-21 15:04:58,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:04:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-21 15:04:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 15:04:58,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:58,318 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] [2020-08-21 15:04:58,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:04:58,319 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-21 15:04:58,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:58,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996296445] [2020-08-21 15:04:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:04:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 15:04:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:04:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 15:04:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 15:04:58,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996296445] [2020-08-21 15:04:58,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:58,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:04:58,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102166756] [2020-08-21 15:04:58,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:58,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:58,507 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-21 15:05:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:01,118 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-21 15:05:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 15:05:01,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-21 15:05:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:01,128 INFO L225 Difference]: With dead ends: 2276 [2020-08-21 15:05:01,129 INFO L226 Difference]: Without dead ends: 1165 [2020-08-21 15:05:01,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 15:05:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-21 15:05:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-21 15:05:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-21 15:05:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-21 15:05:01,292 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-21 15:05:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:01,294 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-21 15:05:01,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:05:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-21 15:05:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 15:05:01,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:01,298 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] [2020-08-21 15:05:01,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:05:01,299 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-21 15:05:01,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:01,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395543699] [2020-08-21 15:05:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:05:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 15:05:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:05:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 15:05:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 15:05:01,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395543699] [2020-08-21 15:05:01,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:01,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:05:01,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989245048] [2020-08-21 15:05:01,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:05:01,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:01,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:05:01,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:05:01,507 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-21 15:05:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:02,431 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-21 15:05:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:05:02,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-21 15:05:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:02,443 INFO L225 Difference]: With dead ends: 1198 [2020-08-21 15:05:02,443 INFO L226 Difference]: Without dead ends: 1195 [2020-08-21 15:05:02,444 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 [2020-08-21 15:05:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-21 15:05:02,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-21 15:05:02,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-21 15:05:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-21 15:05:02,553 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-21 15:05:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:02,553 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-21 15:05:02,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:05:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-21 15:05:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 15:05:02,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:02,557 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] [2020-08-21 15:05:02,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:05:02,557 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-21 15:05:02,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:02,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013141211] [2020-08-21 15:05:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:05:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 15:05:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:05:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 15:05:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 15:05:02,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013141211] [2020-08-21 15:05:02,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:05:02,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:05:02,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255827840] [2020-08-21 15:05:02,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:05:02,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:02,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:05:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:05:02,822 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-21 15:05:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:05,006 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-21 15:05:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 15:05:05,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-21 15:05:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:05,024 INFO L225 Difference]: With dead ends: 2245 [2020-08-21 15:05:05,024 INFO L226 Difference]: Without dead ends: 2242 [2020-08-21 15:05:05,026 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 [2020-08-21 15:05:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-21 15:05:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-21 15:05:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-21 15:05:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-21 15:05:05,315 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-21 15:05:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:05,316 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-21 15:05:05,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:05:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-21 15:05:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 15:05:05,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:05,323 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] [2020-08-21 15:05:05,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:05:05,323 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-21 15:05:05,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:05,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928106326] [2020-08-21 15:05:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:05:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 15:05:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:05:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 15:05:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 15:05:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-21 15:05:05,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928106326] [2020-08-21 15:05:05,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:05,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:05:05,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713682404] [2020-08-21 15:05:05,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:05:05,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:05,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:05:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:05:05,534 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-21 15:05:06,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:06,286 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-21 15:05:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:05:06,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-21 15:05:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:06,300 INFO L225 Difference]: With dead ends: 3453 [2020-08-21 15:05:06,300 INFO L226 Difference]: Without dead ends: 1708 [2020-08-21 15:05:06,321 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 [2020-08-21 15:05:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-21 15:05:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-21 15:05:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-21 15:05:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-21 15:05:06,564 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-21 15:05:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:06,566 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-21 15:05:06,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:05:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-21 15:05:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 15:05:06,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:06,572 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] [2020-08-21 15:05:06,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:05:06,572 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-21 15:05:06,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:06,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124455436] [2020-08-21 15:05:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 15:05:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 15:05:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 15:05:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 15:05:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 15:05:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 15:05:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-21 15:05:06,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124455436] [2020-08-21 15:05:06,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:05:06,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 15:05:06,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980482258] [2020-08-21 15:05:06,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:05:06,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:05:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:05:06,826 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-21 15:05:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:08,388 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-21 15:05:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 15:05:08,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-21 15:05:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:08,395 INFO L225 Difference]: With dead ends: 1974 [2020-08-21 15:05:08,395 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:05:08,407 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 [2020-08-21 15:05:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:05:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:05:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:05:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:05:08,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-21 15:05:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:08,408 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:05:08,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:05:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:05:08,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:05:08,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:05:08,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:05:08,859 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 15:05:16,416 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 15:05:17,518 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 15:05:18,739 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 15:05:19,024 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-21 15:05:19,141 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 15:05:20,172 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-21 15:05:20,365 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 15:05:21,748 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-21 15:05:22,575 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-21 15:05:23,432 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-21 15:05:23,853 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-21 15:05:24,978 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 15:05:25,125 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-21 15:05:25,273 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 15:05:28,517 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-21 15:05:28,691 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 15:05:29,259 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-21 15:05:29,644 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-21 15:05:29,984 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 15:05:30,200 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 15:05:34,607 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-21 15:05:34,755 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-21 15:05:36,819 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-21 15:05:38,073 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-21 15:05:39,447 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-21 15:05:39,622 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 15:05:40,692 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 209 DAG size of output: 93 [2020-08-21 15:05:40,886 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1