/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:17:45,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:17:45,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:17:45,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:17:45,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:17:45,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:17:45,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:17:45,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:17:45,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:17:45,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:17:45,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:17:45,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:17:45,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:17:45,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:17:45,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:17:45,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:17:45,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:17:45,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:17:45,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:17:45,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:17:45,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:17:45,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:17:45,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:17:45,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:17:45,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:17:45,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:17:45,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:17:45,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:17:45,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:17:45,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 12:17:45,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 12:17:45,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 12:17:45,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 12:17:45,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 12:17:45,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 12:17:45,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 12:17:45,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 12:17:45,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 12:17:45,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:17:45,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:17:45,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:17:45,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:17:45,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:17:45,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:17:45,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:17:45,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:17:45,491 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:17:45,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:17:45,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:17:45,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:17:45,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:17:45,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:17:45,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:17:45,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:17:45,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:17:45,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:17:45,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:17:45,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:17:45,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:17:45,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:17:45,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:17:45,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:17:45,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:17:45,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:17:45,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:17:45,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:17:45,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:17:45,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:17:45,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:17:45,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:17:45,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:17:45,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:17:45,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:17:45,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:17:45,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:17:45,825 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:17:45,826 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:17:45,827 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 12:17:45,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2c0dcbc4/0a6bf890f49b4468be7f1460b5865b91/FLAG19fe2e6ea [2020-08-18 12:17:46,369 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:17:46,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 12:17:46,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2c0dcbc4/0a6bf890f49b4468be7f1460b5865b91/FLAG19fe2e6ea [2020-08-18 12:17:46,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2c0dcbc4/0a6bf890f49b4468be7f1460b5865b91 [2020-08-18 12:17:46,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:17:46,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:17:46,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:17:46,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:17:46,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:17:46,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:17:46" (1/1) ... [2020-08-18 12:17:46,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c42496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:46, skipping insertion in model container [2020-08-18 12:17:46,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:17:46" (1/1) ... [2020-08-18 12:17:46,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:17:46,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:17:46,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:17:46,981 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:17:47,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:17:47,034 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:17:47,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47 WrapperNode [2020-08-18 12:17:47,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:17:47,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:17:47,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:17:47,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:17:47,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... [2020-08-18 12:17:47,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... [2020-08-18 12:17:47,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... [2020-08-18 12:17:47,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... [2020-08-18 12:17:47,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... [2020-08-18 12:17:47,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... [2020-08-18 12:17:47,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... [2020-08-18 12:17:47,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:17:47,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:17:47,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:17:47,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:17:47,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:17:47,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:17:47,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:17:47,238 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 12:17:47,238 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 12:17:47,239 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 12:17:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 12:17:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 12:17:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 12:17:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 12:17:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 12:17:47,242 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 12:17:47,242 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 12:17:47,242 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 12:17:47,242 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 12:17:47,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:17:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:17:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:17:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 12:17:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 12:17:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 12:17:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 12:17:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 12:17:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 12:17:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 12:17:47,245 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 12:17:47,245 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 12:17:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 12:17:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 12:17:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 12:17:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:17:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:17:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:17:47,712 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:17:47,713 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 12:17:47,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:17:47 BoogieIcfgContainer [2020-08-18 12:17:47,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:17:47,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:17:47,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:17:47,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:17:47,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:17:46" (1/3) ... [2020-08-18 12:17:47,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fd79f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:17:47, skipping insertion in model container [2020-08-18 12:17:47,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:47" (2/3) ... [2020-08-18 12:17:47,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fd79f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:17:47, skipping insertion in model container [2020-08-18 12:17:47,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:17:47" (3/3) ... [2020-08-18 12:17:47,727 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-18 12:17:47,738 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:17:47,746 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:17:47,761 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:17:47,789 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:17:47,789 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:17:47,789 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:17:47,789 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:17:47,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:17:47,790 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:17:47,790 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:17:47,790 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:17:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-18 12:17:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 12:17:47,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:47,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:47,826 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-18 12:17:47,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:47,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955802083] [2020-08-18 12:17:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:17:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 12:17:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:48,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955802083] [2020-08-18 12:17:48,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:48,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:17:48,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994183964] [2020-08-18 12:17:48,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:17:48,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:48,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:17:48,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:17:48,380 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-18 12:17:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:49,466 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-18 12:17:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:17:49,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-18 12:17:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:49,484 INFO L225 Difference]: With dead ends: 356 [2020-08-18 12:17:49,484 INFO L226 Difference]: Without dead ends: 248 [2020-08-18 12:17:49,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:17:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-18 12:17:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-18 12:17:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 12:17:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-18 12:17:49,576 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-18 12:17:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:49,577 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-18 12:17:49,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:17:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-18 12:17:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 12:17:49,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:49,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:49,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:17:49,583 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-18 12:17:49,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:49,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282552102] [2020-08-18 12:17:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:17:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 12:17:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:49,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282552102] [2020-08-18 12:17:49,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:49,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:17:49,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791535694] [2020-08-18 12:17:49,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:17:49,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:17:49,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:17:49,765 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-18 12:17:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:50,474 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-18 12:17:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:17:50,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-18 12:17:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:50,478 INFO L225 Difference]: With dead ends: 406 [2020-08-18 12:17:50,479 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 12:17:50,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:17:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 12:17:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-18 12:17:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 12:17:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-18 12:17:50,519 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-18 12:17:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:50,519 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-18 12:17:50,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:17:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-18 12:17:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 12:17:50,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:50,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:50,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:17:50,523 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:50,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:50,523 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-18 12:17:50,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:50,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818666523] [2020-08-18 12:17:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:17:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 12:17:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 12:17:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:50,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818666523] [2020-08-18 12:17:50,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:50,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 12:17:50,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473614371] [2020-08-18 12:17:50,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:17:50,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:50,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:17:50,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:17:50,746 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-18 12:17:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:52,019 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-18 12:17:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:17:52,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-18 12:17:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:52,029 INFO L225 Difference]: With dead ends: 582 [2020-08-18 12:17:52,029 INFO L226 Difference]: Without dead ends: 417 [2020-08-18 12:17:52,031 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 [2020-08-18 12:17:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-18 12:17:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-18 12:17:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-18 12:17:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-18 12:17:52,119 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-18 12:17:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:52,121 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-18 12:17:52,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:17:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-18 12:17:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 12:17:52,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:52,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:52,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:17:52,129 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:52,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-18 12:17:52,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:52,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161975355] [2020-08-18 12:17:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:17:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 12:17:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 12:17:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:52,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161975355] [2020-08-18 12:17:52,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:52,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 12:17:52,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834139811] [2020-08-18 12:17:52,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:17:52,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:17:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:17:52,422 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-18 12:17:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:55,414 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-18 12:17:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 12:17:55,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-18 12:17:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:55,429 INFO L225 Difference]: With dead ends: 873 [2020-08-18 12:17:55,430 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 12:17:55,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 12:17:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 12:17:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-18 12:17:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-18 12:17:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-18 12:17:55,509 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-18 12:17:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:55,510 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-18 12:17:55,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:17:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-18 12:17:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 12:17:55,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:55,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:55,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:17:55,521 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-18 12:17:55,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:55,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797522845] [2020-08-18 12:17:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:17:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 12:17:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:55,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797522845] [2020-08-18 12:17:55,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:55,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 12:17:55,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310008777] [2020-08-18 12:17:55,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:17:55,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:17:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:17:55,775 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-18 12:17:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:56,903 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-18 12:17:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:17:56,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-18 12:17:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:56,911 INFO L225 Difference]: With dead ends: 612 [2020-08-18 12:17:56,912 INFO L226 Difference]: Without dead ends: 418 [2020-08-18 12:17:56,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:17:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-18 12:17:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-18 12:17:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 12:17:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-18 12:17:56,955 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-18 12:17:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:56,956 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-18 12:17:56,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:17:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-18 12:17:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 12:17:56,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:56,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:56,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:17:56,958 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:56,959 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-18 12:17:56,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:56,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495535982] [2020-08-18 12:17:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:17:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 12:17:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:57,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495535982] [2020-08-18 12:17:57,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:57,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 12:17:57,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185720390] [2020-08-18 12:17:57,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:17:57,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:57,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:17:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:17:57,148 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-18 12:17:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:57,979 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-18 12:17:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 12:17:57,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 12:17:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:57,987 INFO L225 Difference]: With dead ends: 727 [2020-08-18 12:17:57,988 INFO L226 Difference]: Without dead ends: 421 [2020-08-18 12:17:57,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:17:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-18 12:17:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-18 12:17:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-18 12:17:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-18 12:17:58,041 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-18 12:17:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:58,042 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-18 12:17:58,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:17:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-18 12:17:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 12:17:58,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:58,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:58,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:17:58,044 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-18 12:17:58,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:58,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062609965] [2020-08-18 12:17:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:17:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 12:17:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:58,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062609965] [2020-08-18 12:17:58,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:58,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 12:17:58,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359119007] [2020-08-18 12:17:58,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:17:58,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:58,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:17:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:17:58,238 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-18 12:18:00,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:00,793 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-18 12:18:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 12:18:00,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 12:18:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:00,801 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 12:18:00,801 INFO L226 Difference]: Without dead ends: 840 [2020-08-18 12:18:00,804 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 [2020-08-18 12:18:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-18 12:18:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-18 12:18:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-18 12:18:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-18 12:18:00,870 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-18 12:18:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:00,871 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-18 12:18:00,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:18:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-18 12:18:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 12:18:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:00,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:00,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:18:00,873 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-18 12:18:00,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:00,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503015829] [2020-08-18 12:18:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:00,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:00,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:00,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:18:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:00,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 12:18:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:18:01,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503015829] [2020-08-18 12:18:01,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:01,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 12:18:01,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71323340] [2020-08-18 12:18:01,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:18:01,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:18:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:18:01,044 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-18 12:18:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:01,888 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-18 12:18:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:18:01,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 12:18:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:01,896 INFO L225 Difference]: With dead ends: 1352 [2020-08-18 12:18:01,896 INFO L226 Difference]: Without dead ends: 764 [2020-08-18 12:18:01,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-18 12:18:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-18 12:18:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-18 12:18:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-18 12:18:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-18 12:18:01,973 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-18 12:18:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:01,973 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-18 12:18:01,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:18:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-18 12:18:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 12:18:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:01,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:01,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:18:01,976 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-18 12:18:01,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:01,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857993860] [2020-08-18 12:18:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:18:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 12:18:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:18:02,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857993860] [2020-08-18 12:18:02,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:02,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:18:02,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461403075] [2020-08-18 12:18:02,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:18:02,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:18:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:18:02,152 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-18 12:18:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:02,841 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-18 12:18:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:18:02,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-18 12:18:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:02,847 INFO L225 Difference]: With dead ends: 1262 [2020-08-18 12:18:02,847 INFO L226 Difference]: Without dead ends: 814 [2020-08-18 12:18:02,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:18:02,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-18 12:18:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-18 12:18:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-18 12:18:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-18 12:18:02,935 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-18 12:18:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:02,935 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-18 12:18:02,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:18:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-18 12:18:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 12:18:02,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:02,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:02,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:18:02,938 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-18 12:18:02,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:02,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161393861] [2020-08-18 12:18:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:18:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 12:18:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:18:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 12:18:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 12:18:03,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161393861] [2020-08-18 12:18:03,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:03,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:18:03,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32573179] [2020-08-18 12:18:03,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:18:03,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:03,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:18:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:18:03,140 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-18 12:18:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:05,833 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-18 12:18:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 12:18:05,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-18 12:18:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:05,847 INFO L225 Difference]: With dead ends: 2276 [2020-08-18 12:18:05,847 INFO L226 Difference]: Without dead ends: 1165 [2020-08-18 12:18:05,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 12:18:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-18 12:18:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-18 12:18:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-18 12:18:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-18 12:18:05,989 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-18 12:18:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:05,991 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-18 12:18:05,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:18:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-18 12:18:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 12:18:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:05,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:05,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:18:05,994 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-18 12:18:05,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:05,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756233449] [2020-08-18 12:18:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:18:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 12:18:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 12:18:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 12:18:06,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756233449] [2020-08-18 12:18:06,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:06,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 12:18:06,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167250562] [2020-08-18 12:18:06,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:18:06,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:18:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:18:06,173 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-18 12:18:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:06,999 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-18 12:18:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:18:06,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-18 12:18:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:07,007 INFO L225 Difference]: With dead ends: 1198 [2020-08-18 12:18:07,007 INFO L226 Difference]: Without dead ends: 1195 [2020-08-18 12:18:07,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-18 12:18:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-18 12:18:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-18 12:18:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-18 12:18:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-18 12:18:07,122 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-18 12:18:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:07,123 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-18 12:18:07,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:18:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-18 12:18:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 12:18:07,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:07,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:07,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:18:07,126 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-18 12:18:07,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:07,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371567538] [2020-08-18 12:18:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:18:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 12:18:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 12:18:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 12:18:07,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371567538] [2020-08-18 12:18:07,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:07,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:18:07,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930396451] [2020-08-18 12:18:07,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:18:07,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:07,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:18:07,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:18:07,355 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-18 12:18:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:09,331 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-18 12:18:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 12:18:09,331 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-18 12:18:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:09,349 INFO L225 Difference]: With dead ends: 2245 [2020-08-18 12:18:09,349 INFO L226 Difference]: Without dead ends: 2242 [2020-08-18 12:18:09,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-18 12:18:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-18 12:18:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-18 12:18:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-18 12:18:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-18 12:18:09,670 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-18 12:18:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:09,671 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-18 12:18:09,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:18:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-18 12:18:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-18 12:18:09,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:09,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:09,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 12:18:09,680 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-18 12:18:09,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:09,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261250099] [2020-08-18 12:18:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:18:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 12:18:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 12:18:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 12:18:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-18 12:18:09,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261250099] [2020-08-18 12:18:09,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:09,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:18:09,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715241527] [2020-08-18 12:18:09,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:18:09,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:18:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:18:09,860 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-18 12:18:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:10,957 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-18 12:18:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:18:10,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-18 12:18:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:10,976 INFO L225 Difference]: With dead ends: 3453 [2020-08-18 12:18:10,977 INFO L226 Difference]: Without dead ends: 1708 [2020-08-18 12:18:11,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:18:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-18 12:18:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-18 12:18:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-18 12:18:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-18 12:18:11,256 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-18 12:18:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:11,256 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-18 12:18:11,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:18:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-18 12:18:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 12:18:11,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:11,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:11,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 12:18:11,263 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:11,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-18 12:18:11,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:11,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782212954] [2020-08-18 12:18:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:18:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 12:18:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 12:18:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 12:18:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:18:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-18 12:18:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-18 12:18:11,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782212954] [2020-08-18 12:18:11,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:11,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 12:18:11,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132696345] [2020-08-18 12:18:11,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 12:18:11,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:11,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 12:18:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:18:11,518 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-18 12:18:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:13,128 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-18 12:18:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 12:18:13,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-18 12:18:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:13,131 INFO L225 Difference]: With dead ends: 1974 [2020-08-18 12:18:13,131 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 12:18:13,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:18:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 12:18:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 12:18:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 12:18:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 12:18:13,144 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-18 12:18:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:13,144 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 12:18:13,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 12:18:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 12:18:13,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 12:18:13,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 12:18:13,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 12:18:13,569 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-18 12:18:18,334 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 140 [2020-08-18 12:18:21,289 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 12:18:22,375 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 12:18:23,504 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 12:18:23,781 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-18 12:18:23,891 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 12:18:24,866 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-18 12:18:25,075 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 12:18:26,364 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-18 12:18:27,177 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-18 12:18:27,998 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-18 12:18:28,408 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-18 12:18:29,575 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 12:18:29,710 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-18 12:18:29,853 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 12:18:33,052 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-18 12:18:33,256 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-18 12:18:33,805 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-18 12:18:34,206 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-18 12:18:34,547 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 12:18:34,747 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 12:18:39,211 WARN L193 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-18 12:18:39,355 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-18 12:18:41,365 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-18 12:18:42,528 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-18 12:18:43,909 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-18 12:18:44,089 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46