/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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 [2020-08-22 02:23:09,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:23:09,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:23:09,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:23:09,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:23:09,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:23:09,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:23:09,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:23:09,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:23:09,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:23:09,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:23:09,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:23:09,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:23:09,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:23:09,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:23:09,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:23:09,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:23:09,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:23:09,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:23:09,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:23:09,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:23:09,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:23:09,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:23:09,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:23:09,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:23:09,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:23:09,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:23:09,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:23:09,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:23:09,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 02:23:09,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 02:23:09,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 02:23:09,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 02:23:09,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 02:23:09,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 02:23:09,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 02:23:09,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 02:23:09,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 02:23:09,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:23:09,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:23:09,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:23:09,296 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 [2020-08-22 02:23:09,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:23:09,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:23:09,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:23:09,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:23:09,320 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:23:09,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:23:09,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:23:09,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:23:09,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:23:09,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:23:09,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:23:09,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:23:09,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:23:09,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:23:09,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:23:09,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:23:09,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:23:09,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:23:09,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:23:09,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:23:09,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:23:09,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:23:09,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:23:09,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:23:09,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:23:09,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:23:09,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:23:09,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:23:09,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:23:09,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:23:09,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:23:09,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:23:09,647 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:23:09,649 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:23:09,650 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:23:09,652 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-22 02:23:09,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a85cdd7fb/03b6784193de46548bf069664cd96c77/FLAG10ef32e9f [2020-08-22 02:23:10,218 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:23:10,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-22 02:23:10,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a85cdd7fb/03b6784193de46548bf069664cd96c77/FLAG10ef32e9f [2020-08-22 02:23:10,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a85cdd7fb/03b6784193de46548bf069664cd96c77 [2020-08-22 02:23:10,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:23:10,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:23:10,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:23:10,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:23:10,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:23:10,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:23:10" (1/1) ... [2020-08-22 02:23:10,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e20dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:10, skipping insertion in model container [2020-08-22 02:23:10,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:23:10" (1/1) ... [2020-08-22 02:23:10,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:23:10,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:23:10,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:23:10,911 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:23:10,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:23:11,058 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:23:11,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11 WrapperNode [2020-08-22 02:23:11,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:23:11,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:23:11,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:23:11,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:23:11,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (1/1) ... [2020-08-22 02:23:11,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (1/1) ... [2020-08-22 02:23:11,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (1/1) ... [2020-08-22 02:23:11,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (1/1) ... [2020-08-22 02:23:11,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (1/1) ... [2020-08-22 02:23:11,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (1/1) ... [2020-08-22 02:23:11,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (1/1) ... [2020-08-22 02:23:11,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:23:11,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:23:11,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:23:11,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:23:11,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (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 [2020-08-22 02:23:11,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:23:11,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:23:11,163 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-22 02:23:11,163 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-22 02:23:11,163 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-22 02:23:11,164 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-22 02:23:11,164 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-22 02:23:11,164 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-22 02:23:11,164 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-22 02:23:11,164 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-22 02:23:11,164 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-22 02:23:11,165 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-22 02:23:11,165 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-22 02:23:11,165 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-22 02:23:11,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:23:11,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-22 02:23:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-22 02:23:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-22 02:23:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-22 02:23:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-22 02:23:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-22 02:23:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-22 02:23:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:23:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:23:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:23:11,564 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:23:11,564 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 02:23:11,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:23:11 BoogieIcfgContainer [2020-08-22 02:23:11,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:23:11,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:23:11,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:23:11,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:23:11,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:23:10" (1/3) ... [2020-08-22 02:23:11,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ab98d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:23:11, skipping insertion in model container [2020-08-22 02:23:11,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:11" (2/3) ... [2020-08-22 02:23:11,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ab98d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:23:11, skipping insertion in model container [2020-08-22 02:23:11,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:23:11" (3/3) ... [2020-08-22 02:23:11,579 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-22 02:23:11,590 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:23:11,599 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:23:11,619 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:23:11,647 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:23:11,647 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:23:11,647 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:23:11,647 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:23:11,647 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:23:11,648 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:23:11,648 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:23:11,648 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:23:11,668 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-22 02:23:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 02:23:11,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:11,679 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] [2020-08-22 02:23:11,680 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-22 02:23:11,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:11,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177679250] [2020-08-22 02:23:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 02:23:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:12,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177679250] [2020-08-22 02:23:12,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:12,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:23:12,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317732736] [2020-08-22 02:23:12,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:23:12,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:23:12,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:23:12,223 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-22 02:23:13,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:13,395 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-22 02:23:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:23:13,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-22 02:23:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:13,431 INFO L225 Difference]: With dead ends: 356 [2020-08-22 02:23:13,431 INFO L226 Difference]: Without dead ends: 248 [2020-08-22 02:23:13,442 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 [2020-08-22 02:23:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-22 02:23:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-22 02:23:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 02:23:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-22 02:23:13,551 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-22 02:23:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:13,551 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-22 02:23:13,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:23:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-22 02:23:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 02:23:13,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:13,558 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] [2020-08-22 02:23:13,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:23:13,559 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:13,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-22 02:23:13,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:13,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891794676] [2020-08-22 02:23:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:23:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:13,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891794676] [2020-08-22 02:23:13,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:13,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 02:23:13,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598527071] [2020-08-22 02:23:13,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:23:13,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:13,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:23:13,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:23:13,759 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-22 02:23:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:14,353 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-22 02:23:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:23:14,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-22 02:23:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:14,358 INFO L225 Difference]: With dead ends: 406 [2020-08-22 02:23:14,359 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 02:23:14,361 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 [2020-08-22 02:23:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 02:23:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-22 02:23:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-22 02:23:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-22 02:23:14,416 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-22 02:23:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:14,417 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-22 02:23:14,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:23:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-22 02:23:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 02:23:14,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:14,420 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] [2020-08-22 02:23:14,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:23:14,420 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-22 02:23:14,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:14,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215775182] [2020-08-22 02:23:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 02:23:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 02:23:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:14,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215775182] [2020-08-22 02:23:14,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:14,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 02:23:14,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241711167] [2020-08-22 02:23:14,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:23:14,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:23:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:23:14,669 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-22 02:23:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:16,020 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-22 02:23:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 02:23:16,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-22 02:23:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:16,029 INFO L225 Difference]: With dead ends: 582 [2020-08-22 02:23:16,029 INFO L226 Difference]: Without dead ends: 417 [2020-08-22 02:23:16,031 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 [2020-08-22 02:23:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-22 02:23:16,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-22 02:23:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-22 02:23:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-22 02:23:16,116 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-22 02:23:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:16,117 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-22 02:23:16,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:23:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-22 02:23:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 02:23:16,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:16,121 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] [2020-08-22 02:23:16,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:23:16,122 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:16,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-22 02:23:16,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:16,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421462769] [2020-08-22 02:23:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 02:23:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 02:23:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:16,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421462769] [2020-08-22 02:23:16,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:16,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 02:23:16,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741680852] [2020-08-22 02:23:16,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 02:23:16,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 02:23:16,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:23:16,422 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-22 02:23:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:19,516 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-22 02:23:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 02:23:19,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-22 02:23:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:19,526 INFO L225 Difference]: With dead ends: 873 [2020-08-22 02:23:19,526 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 02:23:19,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 02:23:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 02:23:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-22 02:23:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-22 02:23:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-22 02:23:19,585 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-22 02:23:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:19,586 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-22 02:23:19,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 02:23:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-22 02:23:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 02:23:19,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:19,588 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] [2020-08-22 02:23:19,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:23:19,588 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-22 02:23:19,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:19,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872793777] [2020-08-22 02:23:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:23:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:19,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872793777] [2020-08-22 02:23:19,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:19,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 02:23:19,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206767074] [2020-08-22 02:23:19,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:23:19,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:23:19,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:23:19,789 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-22 02:23:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:20,931 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-22 02:23:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:23:20,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-22 02:23:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:20,938 INFO L225 Difference]: With dead ends: 612 [2020-08-22 02:23:20,938 INFO L226 Difference]: Without dead ends: 418 [2020-08-22 02:23:20,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:23:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-22 02:23:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-22 02:23:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 02:23:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-22 02:23:20,999 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-22 02:23:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:21,000 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-22 02:23:21,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:23:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-22 02:23:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 02:23:21,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:21,003 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] [2020-08-22 02:23:21,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:23:21,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-22 02:23:21,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:21,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285699601] [2020-08-22 02:23:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:23:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:21,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285699601] [2020-08-22 02:23:21,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:21,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 02:23:21,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501821903] [2020-08-22 02:23:21,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:23:21,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:23:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:23:21,191 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-22 02:23:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:22,035 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-22 02:23:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 02:23:22,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 02:23:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:22,040 INFO L225 Difference]: With dead ends: 727 [2020-08-22 02:23:22,040 INFO L226 Difference]: Without dead ends: 421 [2020-08-22 02:23:22,042 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 [2020-08-22 02:23:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-22 02:23:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-22 02:23:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-22 02:23:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-22 02:23:22,083 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-22 02:23:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:22,084 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-22 02:23:22,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:23:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-22 02:23:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 02:23:22,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:22,085 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] [2020-08-22 02:23:22,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:23:22,086 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:22,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-22 02:23:22,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:22,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495346291] [2020-08-22 02:23:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:23:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:22,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495346291] [2020-08-22 02:23:22,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:22,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 02:23:22,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898411602] [2020-08-22 02:23:22,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:23:22,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:22,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:23:22,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:23:22,238 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-22 02:23:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:24,854 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-22 02:23:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 02:23:24,854 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 02:23:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:24,863 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 02:23:24,863 INFO L226 Difference]: Without dead ends: 840 [2020-08-22 02:23:24,867 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 [2020-08-22 02:23:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-22 02:23:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-22 02:23:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-22 02:23:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-22 02:23:24,978 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-22 02:23:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:24,982 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-22 02:23:24,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:23:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-22 02:23:24,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 02:23:24,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:24,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:23:24,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:23:24,991 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-22 02:23:24,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:24,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588858851] [2020-08-22 02:23:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:23:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:25,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588858851] [2020-08-22 02:23:25,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:25,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 02:23:25,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230159242] [2020-08-22 02:23:25,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:23:25,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:23:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:23:25,217 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-22 02:23:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:26,114 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-22 02:23:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:23:26,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 02:23:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:26,122 INFO L225 Difference]: With dead ends: 1352 [2020-08-22 02:23:26,122 INFO L226 Difference]: Without dead ends: 764 [2020-08-22 02:23:26,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:23:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-22 02:23:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-22 02:23:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-22 02:23:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-22 02:23:26,193 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-22 02:23:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:26,193 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-22 02:23:26,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:23:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-22 02:23:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 02:23:26,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:26,195 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] [2020-08-22 02:23:26,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:23:26,195 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:26,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-22 02:23:26,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:26,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534819201] [2020-08-22 02:23:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:23:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:23:26,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534819201] [2020-08-22 02:23:26,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:26,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:23:26,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341236726] [2020-08-22 02:23:26,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:23:26,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:23:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:23:26,330 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-22 02:23:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:27,150 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-22 02:23:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:23:27,151 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-22 02:23:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:27,158 INFO L225 Difference]: With dead ends: 1262 [2020-08-22 02:23:27,158 INFO L226 Difference]: Without dead ends: 814 [2020-08-22 02:23:27,160 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 [2020-08-22 02:23:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-22 02:23:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-22 02:23:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-22 02:23:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-22 02:23:27,241 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-22 02:23:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:27,241 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-22 02:23:27,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:23:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-22 02:23:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 02:23:27,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:27,245 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] [2020-08-22 02:23:27,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:23:27,246 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-22 02:23:27,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:27,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520140381] [2020-08-22 02:23:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 02:23:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 02:23:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 02:23:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 02:23:27,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520140381] [2020-08-22 02:23:27,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:23:27,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:23:27,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696265240] [2020-08-22 02:23:27,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:23:27,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:23:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:23:27,439 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-22 02:23:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:30,098 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-22 02:23:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 02:23:30,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-22 02:23:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:30,107 INFO L225 Difference]: With dead ends: 2276 [2020-08-22 02:23:30,107 INFO L226 Difference]: Without dead ends: 1165 [2020-08-22 02:23:30,114 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 [2020-08-22 02:23:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-22 02:23:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-22 02:23:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-22 02:23:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-22 02:23:30,236 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-22 02:23:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:30,237 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-22 02:23:30,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:23:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-22 02:23:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 02:23:30,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:30,240 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] [2020-08-22 02:23:30,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:23:30,241 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-22 02:23:30,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:30,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822650042] [2020-08-22 02:23:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 02:23:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 02:23:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 02:23:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 02:23:30,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822650042] [2020-08-22 02:23:30,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:30,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 02:23:30,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721009333] [2020-08-22 02:23:30,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:23:30,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:23:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:23:30,418 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-22 02:23:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:31,607 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-22 02:23:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:23:31,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-22 02:23:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:31,617 INFO L225 Difference]: With dead ends: 1198 [2020-08-22 02:23:31,617 INFO L226 Difference]: Without dead ends: 1195 [2020-08-22 02:23:31,618 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 [2020-08-22 02:23:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-22 02:23:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-22 02:23:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-22 02:23:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-22 02:23:31,744 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-22 02:23:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:31,744 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-22 02:23:31,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:23:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-22 02:23:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 02:23:31,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:31,747 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] [2020-08-22 02:23:31,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:23:31,748 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-22 02:23:31,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:31,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960045953] [2020-08-22 02:23:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 02:23:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 02:23:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 02:23:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 02:23:31,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960045953] [2020-08-22 02:23:31,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:23:31,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:23:31,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097948044] [2020-08-22 02:23:31,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:23:31,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:31,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:23:31,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:23:31,990 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-22 02:23:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:34,343 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-22 02:23:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 02:23:34,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-22 02:23:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:34,370 INFO L225 Difference]: With dead ends: 2245 [2020-08-22 02:23:34,371 INFO L226 Difference]: Without dead ends: 2242 [2020-08-22 02:23:34,374 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 [2020-08-22 02:23:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-22 02:23:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-22 02:23:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-22 02:23:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-22 02:23:34,712 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-22 02:23:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:34,713 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-22 02:23:34,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:23:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-22 02:23:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-22 02:23:34,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:34,720 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] [2020-08-22 02:23:34,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:23:34,721 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-22 02:23:34,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:34,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780450953] [2020-08-22 02:23:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 02:23:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 02:23:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 02:23:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 02:23:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-22 02:23:34,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780450953] [2020-08-22 02:23:34,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:23:34,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 02:23:34,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121021767] [2020-08-22 02:23:34,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:23:34,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:23:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:23:34,916 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-22 02:23:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:35,725 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-22 02:23:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:23:35,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-22 02:23:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:35,739 INFO L225 Difference]: With dead ends: 3453 [2020-08-22 02:23:35,739 INFO L226 Difference]: Without dead ends: 1708 [2020-08-22 02:23:35,754 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 [2020-08-22 02:23:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-22 02:23:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-22 02:23:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-22 02:23:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-22 02:23:36,023 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-22 02:23:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:36,024 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-22 02:23:36,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:23:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-22 02:23:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 02:23:36,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:23:36,030 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] [2020-08-22 02:23:36,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:23:36,031 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:23:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:23:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-22 02:23:36,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:23:36,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46661211] [2020-08-22 02:23:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:23:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:23:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:23:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 02:23:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 02:23:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 02:23:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 02:23:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 02:23:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 02:23:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:23:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 02:23:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:23:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:23:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:23:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-22 02:23:36,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46661211] [2020-08-22 02:23:36,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:23:36,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 02:23:36,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139300683] [2020-08-22 02:23:36,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 02:23:36,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:23:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 02:23:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:23:36,378 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-22 02:23:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:23:37,983 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-22 02:23:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 02:23:37,991 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-22 02:23:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:23:37,993 INFO L225 Difference]: With dead ends: 1974 [2020-08-22 02:23:37,993 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 02:23:38,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-22 02:23:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 02:23:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 02:23:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 02:23:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 02:23:38,007 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-22 02:23:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:23:38,007 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 02:23:38,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 02:23:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 02:23:38,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 02:23:38,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:23:38,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 02:23:38,533 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-22 02:23:40,022 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-22 02:23:46,437 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 02:23:47,517 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 02:23:48,710 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 02:23:48,996 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-22 02:23:49,105 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-22 02:23:50,098 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-22 02:23:50,297 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 02:23:51,569 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-22 02:23:52,392 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-22 02:23:53,204 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-22 02:23:53,589 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-22 02:23:54,696 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 02:23:54,829 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-22 02:23:54,985 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-22 02:23:58,236 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-22 02:23:58,403 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-22 02:23:58,946 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-22 02:23:59,333 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-22 02:23:59,692 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 02:23:59,885 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 02:24:04,342 WARN L193 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-22 02:24:04,489 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-22 02:24:06,502 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-22 02:24:07,683 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 165 DAG size of output: 101