/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 -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 11:29:30,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:29:30,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:29:30,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:29:30,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:29:30,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:29:30,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:29:30,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:29:30,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:29:30,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:29:30,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:29:30,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:29:30,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:29:30,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:29:30,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:29:30,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:29:30,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:29:30,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:29:30,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:29:30,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:29:30,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:29:30,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:29:30,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:29:30,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:29:30,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:29:30,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:29:30,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:29:30,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:29:30,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:29:30,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:29:30,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:29:30,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:29:30,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:29:30,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:29:30,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:29:30,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:29:30,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:29:30,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:29:30,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:29:30,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:29:30,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:29:30,482 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 11:29:30,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:29:30,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:29:30,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:29:30,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:29:30,506 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:29:30,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:29:30,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:29:30,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:29:30,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:29:30,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:29:30,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:29:30,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:29:30,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:29:30,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:29:30,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:29:30,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:29:30,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:29:30,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:29:30,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:29:30,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:29:30,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:29:30,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:29:30,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:29:30,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:29:30,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:29:30,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:29:30,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:29:30,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:29:30,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:29:30,511 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 [2020-08-18 11:29:30,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:29:30,844 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:29:30,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:29:30,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:29:30,852 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:29:30,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 11:29:30,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/591b6b335/8c7ad55632c248f0a40a630b138b6e4b/FLAGfb22e3e21 [2020-08-18 11:29:31,372 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:29:31,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 11:29:31,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/591b6b335/8c7ad55632c248f0a40a630b138b6e4b/FLAGfb22e3e21 [2020-08-18 11:29:31,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/591b6b335/8c7ad55632c248f0a40a630b138b6e4b [2020-08-18 11:29:31,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:29:31,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:29:31,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:29:31,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:29:31,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:29:31,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:31" (1/1) ... [2020-08-18 11:29:31,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e3ee29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:31, skipping insertion in model container [2020-08-18 11:29:31,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:31" (1/1) ... [2020-08-18 11:29:31,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:29:31,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:29:32,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:29:32,035 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:29:32,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:29:32,159 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:29:32,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32 WrapperNode [2020-08-18 11:29:32,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:29:32,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:29:32,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:29:32,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:29:32,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:29:32,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:29:32,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:29:32,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:29:32,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (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 11:29:32,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:29:32,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:29:32,281 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 11:29:32,281 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 11:29:32,281 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 11:29:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 11:29:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 11:29:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 11:29:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 11:29:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 11:29:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 11:29:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 11:29:32,283 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 11:29:32,283 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 11:29:32,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:29:32,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:29:32,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:29:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 11:29:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 11:29:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 11:29:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 11:29:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 11:29:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 11:29:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 11:29:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 11:29:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 11:29:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 11:29:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 11:29:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 11:29:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:29:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:29:32,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:29:32,695 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:29:32,695 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 11:29:32,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:32 BoogieIcfgContainer [2020-08-18 11:29:32,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:29:32,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:29:32,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:29:32,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:29:32,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:29:31" (1/3) ... [2020-08-18 11:29:32,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f60d835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:32, skipping insertion in model container [2020-08-18 11:29:32,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32" (2/3) ... [2020-08-18 11:29:32,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f60d835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:32, skipping insertion in model container [2020-08-18 11:29:32,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:32" (3/3) ... [2020-08-18 11:29:32,718 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-18 11:29:32,728 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:29:32,742 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:29:32,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:29:32,777 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:29:32,777 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:29:32,777 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:29:32,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:29:32,777 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:29:32,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:29:32,778 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:29:32,778 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:29:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-18 11:29:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 11:29:32,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:32,810 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 11:29:32,811 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:32,817 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-18 11:29:32,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:32,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135546615] [2020-08-18 11:29:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:29:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:33,396 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 11:29:33,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135546615] [2020-08-18 11:29:33,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:33,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:29:33,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761358184] [2020-08-18 11:29:33,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:29:33,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:29:33,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:29:33,427 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-18 11:29:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:34,506 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-18 11:29:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:29:34,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-18 11:29:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:34,525 INFO L225 Difference]: With dead ends: 356 [2020-08-18 11:29:34,525 INFO L226 Difference]: Without dead ends: 248 [2020-08-18 11:29:34,530 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 11:29:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-18 11:29:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-18 11:29:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 11:29:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-18 11:29:34,636 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-18 11:29:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:34,637 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-18 11:29:34,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:29:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-18 11:29:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 11:29:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:34,652 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 11:29:34,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:29:34,653 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:34,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-18 11:29:34,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:34,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83924629] [2020-08-18 11:29:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:29:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,879 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 11:29:34,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83924629] [2020-08-18 11:29:34,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:34,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:29:34,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180307860] [2020-08-18 11:29:34,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:29:34,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:34,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:29:34,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:29:34,883 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-18 11:29:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:35,508 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-18 11:29:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:29:35,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-18 11:29:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:35,517 INFO L225 Difference]: With dead ends: 406 [2020-08-18 11:29:35,517 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 11:29:35,525 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 11:29:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 11:29:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-18 11:29:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 11:29:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-18 11:29:35,567 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-18 11:29:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:35,568 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-18 11:29:35,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:29:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-18 11:29:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 11:29:35,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:35,570 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 11:29:35,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:29:35,571 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:35,571 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-18 11:29:35,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:35,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390807036] [2020-08-18 11:29:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:29:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 11:29:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:35,783 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 11:29:35,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390807036] [2020-08-18 11:29:35,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:35,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:29:35,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814721999] [2020-08-18 11:29:35,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:29:35,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:29:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:29:35,786 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-18 11:29:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:37,052 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-18 11:29:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 11:29:37,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-18 11:29:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:37,069 INFO L225 Difference]: With dead ends: 582 [2020-08-18 11:29:37,070 INFO L226 Difference]: Without dead ends: 417 [2020-08-18 11:29:37,073 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 11:29:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-18 11:29:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-18 11:29:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-18 11:29:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-18 11:29:37,148 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-18 11:29:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:37,148 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-18 11:29:37,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:29:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-18 11:29:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 11:29:37,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:37,150 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 11:29:37,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:29:37,151 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:37,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-18 11:29:37,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:37,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421462769] [2020-08-18 11:29:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:29:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:29:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,402 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 11:29:37,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421462769] [2020-08-18 11:29:37,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:37,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 11:29:37,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741680852] [2020-08-18 11:29:37,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:29:37,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:29:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:29:37,405 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-18 11:29:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:40,344 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-18 11:29:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 11:29:40,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-18 11:29:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:40,354 INFO L225 Difference]: With dead ends: 873 [2020-08-18 11:29:40,354 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 11:29:40,358 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 11:29:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 11:29:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-18 11:29:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-18 11:29:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-18 11:29:40,444 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-18 11:29:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:40,447 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-18 11:29:40,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 11:29:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-18 11:29:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 11:29:40,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:40,452 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 11:29:40,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:29:40,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-18 11:29:40,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:40,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755386577] [2020-08-18 11:29:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:29:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,660 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 11:29:40,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755386577] [2020-08-18 11:29:40,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:40,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:29:40,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716272538] [2020-08-18 11:29:40,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:29:40,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:40,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:29:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:29:40,663 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-18 11:29:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:41,716 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-18 11:29:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:29:41,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-18 11:29:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:41,721 INFO L225 Difference]: With dead ends: 612 [2020-08-18 11:29:41,721 INFO L226 Difference]: Without dead ends: 418 [2020-08-18 11:29:41,724 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 11:29:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-18 11:29:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-18 11:29:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 11:29:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-18 11:29:41,772 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-18 11:29:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:41,772 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-18 11:29:41,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:29:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-18 11:29:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 11:29:41,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:41,775 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 11:29:41,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:29:41,775 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:41,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:41,776 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-18 11:29:41,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:41,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285699601] [2020-08-18 11:29:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:29:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,959 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 11:29:41,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285699601] [2020-08-18 11:29:41,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:41,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:29:41,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501821903] [2020-08-18 11:29:41,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:29:41,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:29:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:29:41,963 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-18 11:29:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:42,916 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-18 11:29:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:29:42,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 11:29:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:42,921 INFO L225 Difference]: With dead ends: 727 [2020-08-18 11:29:42,921 INFO L226 Difference]: Without dead ends: 421 [2020-08-18 11:29:42,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:29:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-18 11:29:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-18 11:29:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-18 11:29:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-18 11:29:42,979 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-18 11:29:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:42,981 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-18 11:29:42,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:29:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-18 11:29:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 11:29:42,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:42,983 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 11:29:42,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:29:42,984 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:42,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-18 11:29:42,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:42,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495346291] [2020-08-18 11:29:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:29:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,214 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 11:29:43,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495346291] [2020-08-18 11:29:43,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:43,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:29:43,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898411602] [2020-08-18 11:29:43,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:29:43,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:29:43,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:29:43,222 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-18 11:29:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:45,829 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-18 11:29:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 11:29:45,830 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 11:29:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:45,837 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 11:29:45,837 INFO L226 Difference]: Without dead ends: 840 [2020-08-18 11:29:45,840 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 11:29:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-18 11:29:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-18 11:29:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-18 11:29:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-18 11:29:45,911 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-18 11:29:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:45,911 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-18 11:29:45,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:29:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-18 11:29:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 11:29:45,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:45,913 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 11:29:45,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:29:45,913 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-18 11:29:45,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:45,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588858851] [2020-08-18 11:29:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:29:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,088 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 11:29:46,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588858851] [2020-08-18 11:29:46,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:46,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:29:46,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230159242] [2020-08-18 11:29:46,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:29:46,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:29:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:29:46,090 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-18 11:29:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:46,969 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-18 11:29:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:29:46,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 11:29:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:46,975 INFO L225 Difference]: With dead ends: 1352 [2020-08-18 11:29:46,976 INFO L226 Difference]: Without dead ends: 764 [2020-08-18 11:29:46,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:29:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-18 11:29:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-18 11:29:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-18 11:29:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-18 11:29:47,051 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-18 11:29:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:47,052 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-18 11:29:47,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:29:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-18 11:29:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 11:29:47,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:47,054 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 11:29:47,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:29:47,054 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:47,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-18 11:29:47,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:47,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534819201] [2020-08-18 11:29:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:29:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:47,228 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 11:29:47,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534819201] [2020-08-18 11:29:47,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:47,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:29:47,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341236726] [2020-08-18 11:29:47,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:29:47,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:29:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:29:47,234 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-18 11:29:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:47,955 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-18 11:29:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:29:47,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-18 11:29:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:47,961 INFO L225 Difference]: With dead ends: 1262 [2020-08-18 11:29:47,961 INFO L226 Difference]: Without dead ends: 814 [2020-08-18 11:29:47,964 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 11:29:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-18 11:29:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-18 11:29:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-18 11:29:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-18 11:29:48,057 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-18 11:29:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:48,058 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-18 11:29:48,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:29:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-18 11:29:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 11:29:48,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:48,061 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 11:29:48,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:29:48,061 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:48,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-18 11:29:48,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:48,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520140381] [2020-08-18 11:29:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 11:29:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 11:29:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 11:29:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,280 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 11:29:48,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520140381] [2020-08-18 11:29:48,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:29:48,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:29:48,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696265240] [2020-08-18 11:29:48,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:29:48,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:29:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:29:48,283 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-18 11:29:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:50,868 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-18 11:29:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 11:29:50,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-18 11:29:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:50,877 INFO L225 Difference]: With dead ends: 2276 [2020-08-18 11:29:50,877 INFO L226 Difference]: Without dead ends: 1165 [2020-08-18 11:29:50,884 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 11:29:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-18 11:29:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-18 11:29:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-18 11:29:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-18 11:29:51,017 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-18 11:29:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:51,019 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-18 11:29:51,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:29:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-18 11:29:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 11:29:51,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:51,024 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 11:29:51,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:29:51,025 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-18 11:29:51,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:51,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822650042] [2020-08-18 11:29:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:29:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:29:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 11:29:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:51,208 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 11:29:51,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822650042] [2020-08-18 11:29:51,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:51,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:29:51,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721009333] [2020-08-18 11:29:51,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:29:51,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:29:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:29:51,211 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-18 11:29:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:52,022 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-18 11:29:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:29:52,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-18 11:29:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:52,032 INFO L225 Difference]: With dead ends: 1198 [2020-08-18 11:29:52,032 INFO L226 Difference]: Without dead ends: 1195 [2020-08-18 11:29:52,033 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 11:29:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-18 11:29:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-18 11:29:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-18 11:29:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-18 11:29:52,148 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-18 11:29:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:52,149 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-18 11:29:52,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:29:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-18 11:29:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 11:29:52,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:52,151 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 11:29:52,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:29:52,152 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-18 11:29:52,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:52,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960045953] [2020-08-18 11:29:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:29:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:29:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 11:29:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:52,419 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 11:29:52,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960045953] [2020-08-18 11:29:52,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:29:52,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:29:52,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097948044] [2020-08-18 11:29:52,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:29:52,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:29:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:29:52,422 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-18 11:29:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:54,495 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-18 11:29:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 11:29:54,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-18 11:29:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:54,514 INFO L225 Difference]: With dead ends: 2245 [2020-08-18 11:29:54,514 INFO L226 Difference]: Without dead ends: 2242 [2020-08-18 11:29:54,516 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 11:29:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-18 11:29:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-18 11:29:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-18 11:29:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-18 11:29:54,813 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-18 11:29:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:54,813 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-18 11:29:54,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:29:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-18 11:29:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-18 11:29:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:54,825 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 11:29:54,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 11:29:54,825 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:54,826 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-18 11:29:54,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:54,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780450953] [2020-08-18 11:29:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:29:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:29:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:29:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:54,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 11:29:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:55,033 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 11:29:55,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780450953] [2020-08-18 11:29:55,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:55,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:29:55,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121021767] [2020-08-18 11:29:55,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:29:55,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:55,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:29:55,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:29:55,036 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-18 11:29:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:55,841 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-18 11:29:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:29:55,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-18 11:29:55,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:55,854 INFO L225 Difference]: With dead ends: 3453 [2020-08-18 11:29:55,854 INFO L226 Difference]: Without dead ends: 1708 [2020-08-18 11:29:55,870 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 11:29:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-18 11:29:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-18 11:29:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-18 11:29:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-18 11:29:56,143 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-18 11:29:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:56,144 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-18 11:29:56,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:29:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-18 11:29:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 11:29:56,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:56,153 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 11:29:56,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 11:29:56,153 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-18 11:29:56,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:56,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46661211] [2020-08-18 11:29:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:29:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:29:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 11:29:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 11:29:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 11:29:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 11:29:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-18 11:29:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:56,510 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 11:29:56,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46661211] [2020-08-18 11:29:56,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:29:56,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 11:29:56,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139300683] [2020-08-18 11:29:56,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:29:56,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:29:56,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:29:56,513 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-18 11:29:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:58,203 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-18 11:29:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 11:29:58,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-18 11:29:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:58,206 INFO L225 Difference]: With dead ends: 1974 [2020-08-18 11:29:58,206 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 11:29:58,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-18 11:29:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 11:29:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 11:29:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 11:29:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 11:29:58,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-18 11:29:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:58,219 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 11:29:58,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:29:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 11:29:58,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 11:29:58,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 11:29:58,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 11:29:58,702 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-18 11:30:05,795 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2020-08-18 11:30:07,121 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 11:30:08,229 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 11:30:09,461 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 11:30:09,728 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-18 11:30:09,837 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 11:30:10,835 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-18 11:30:11,026 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 11:30:12,377 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-18 11:30:13,218 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-18 11:30:14,064 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-18 11:30:14,455 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-18 11:30:15,567 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 11:30:15,696 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-18 11:30:15,845 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 11:30:19,187 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-18 11:30:19,360 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-18 11:30:19,895 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-18 11:30:20,271 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-18 11:30:20,611 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 11:30:20,803 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 11:30:25,136 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-18 11:30:25,277 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-18 11:30:27,295 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-18 11:30:28,502 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 165 DAG size of output: 101