/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:16:27,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:16:27,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:16:27,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:16:27,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:16:27,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:16:27,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:16:27,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:16:27,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:16:27,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:16:27,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:16:27,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:16:27,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:16:27,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:16:27,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:16:27,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:16:27,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:16:27,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:16:27,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:16:27,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:16:27,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:16:27,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:16:27,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:16:27,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:16:27,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:16:27,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:16:27,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:16:27,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:16:27,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:16:27,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 14:16:27,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:16:27,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:16:27,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:16:27,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:16:27,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:16:27,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:16:27,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:16:27,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:16:27,761 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:16:27,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:16:27,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:16:27,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:16:27,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:16:27,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:16:27,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:16:27,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:16:27,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:16:27,764 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:16:27,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:16:27,764 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:16:27,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:16:27,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:16:27,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:16:27,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:16:27,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:16:27,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:16:27,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:16:27,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:16:27,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:16:27,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:16:27,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:16:27,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:16:27,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:16:27,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> log-additional-information=true; [2020-08-21 14:16:28,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:16:28,053 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:16:28,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:16:28,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:16:28,059 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:16:28,060 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 14:16:28,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb9e0d36/296954e37bfa4d3a91ca61e821115323/FLAGf3e448cbe [2020-08-21 14:16:28,599 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:16:28,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 14:16:28,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb9e0d36/296954e37bfa4d3a91ca61e821115323/FLAGf3e448cbe [2020-08-21 14:16:28,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb9e0d36/296954e37bfa4d3a91ca61e821115323 [2020-08-21 14:16:29,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:16:29,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:16:29,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:16:29,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:16:29,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:16:29,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:16:28" (1/1) ... [2020-08-21 14:16:29,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29, skipping insertion in model container [2020-08-21 14:16:29,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:16:28" (1/1) ... [2020-08-21 14:16:29,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:16:29,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:16:29,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:16:29,297 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:16:29,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:16:29,346 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:16:29,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29 WrapperNode [2020-08-21 14:16:29,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:16:29,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:16:29,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:16:29,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:16:29,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... [2020-08-21 14:16:29,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... [2020-08-21 14:16:29,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... [2020-08-21 14:16:29,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... [2020-08-21 14:16:29,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... [2020-08-21 14:16:29,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... [2020-08-21 14:16:29,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... [2020-08-21 14:16:29,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:16:29,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:16:29,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:16:29,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:16:29,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:16:29,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:16:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:16:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 14:16:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 14:16:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 14:16:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 14:16:29,528 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 14:16:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 14:16:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 14:16:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 14:16:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 14:16:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 14:16:29,529 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 14:16:29,530 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 14:16:29,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:16:29,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:16:29,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:16:29,530 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 14:16:29,530 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 14:16:29,531 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 14:16:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 14:16:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 14:16:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:16:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:16:29,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:16:29,980 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:16:29,980 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 14:16:29,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:16:29 BoogieIcfgContainer [2020-08-21 14:16:29,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:16:29,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:16:29,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:16:29,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:16:30,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:16:28" (1/3) ... [2020-08-21 14:16:30,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6efc1c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:16:30, skipping insertion in model container [2020-08-21 14:16:30,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:29" (2/3) ... [2020-08-21 14:16:30,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6efc1c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:16:30, skipping insertion in model container [2020-08-21 14:16:30,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:16:29" (3/3) ... [2020-08-21 14:16:30,007 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-21 14:16:30,017 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:16:30,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:16:30,043 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:16:30,069 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:16:30,069 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:16:30,069 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:16:30,070 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:16:30,070 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:16:30,070 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:16:30,070 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:16:30,070 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:16:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-21 14:16:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 14:16:30,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:30,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:30,104 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-21 14:16:30,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:30,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209715719] [2020-08-21 14:16:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:16:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:30,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209715719] [2020-08-21 14:16:30,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:30,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:16:30,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921307733] [2020-08-21 14:16:30,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:16:30,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:16:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:16:30,655 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-21 14:16:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:31,852 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-21 14:16:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:16:31,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 14:16:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:31,870 INFO L225 Difference]: With dead ends: 356 [2020-08-21 14:16:31,871 INFO L226 Difference]: Without dead ends: 248 [2020-08-21 14:16:31,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-21 14:16:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-21 14:16:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 14:16:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-21 14:16:31,966 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-21 14:16:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:31,967 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-21 14:16:31,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:16:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-21 14:16:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 14:16:31,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:31,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:31,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:16:31,974 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-21 14:16:31,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:31,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116443353] [2020-08-21 14:16:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:16:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:32,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116443353] [2020-08-21 14:16:32,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:32,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:16:32,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949919827] [2020-08-21 14:16:32,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:16:32,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:16:32,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:16:32,190 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-21 14:16:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:32,848 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-21 14:16:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:16:32,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-21 14:16:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:32,854 INFO L225 Difference]: With dead ends: 406 [2020-08-21 14:16:32,855 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 14:16:32,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:16:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 14:16:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-21 14:16:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 14:16:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-21 14:16:32,896 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-21 14:16:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:32,896 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-21 14:16:32,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:16:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-21 14:16:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 14:16:32,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:32,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:32,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:16:32,900 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:32,900 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-21 14:16:32,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:32,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402467720] [2020-08-21 14:16:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:16:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 14:16:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:33,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402467720] [2020-08-21 14:16:33,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:33,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:16:33,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704316353] [2020-08-21 14:16:33,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:33,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:33,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:33,148 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-21 14:16:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:34,379 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-21 14:16:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:16:34,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-21 14:16:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:34,391 INFO L225 Difference]: With dead ends: 582 [2020-08-21 14:16:34,391 INFO L226 Difference]: Without dead ends: 417 [2020-08-21 14:16:34,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:16:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-21 14:16:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-21 14:16:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-21 14:16:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-21 14:16:34,480 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-21 14:16:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:34,480 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-21 14:16:34,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-21 14:16:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 14:16:34,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:34,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:34,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:16:34,484 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:34,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:34,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-21 14:16:34,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:34,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143283878] [2020-08-21 14:16:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:16:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:16:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:34,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143283878] [2020-08-21 14:16:34,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:34,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 14:16:34,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541393478] [2020-08-21 14:16:34,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:16:34,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:16:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:16:34,752 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-21 14:16:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:37,699 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-21 14:16:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 14:16:37,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-21 14:16:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:37,705 INFO L225 Difference]: With dead ends: 873 [2020-08-21 14:16:37,706 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 14:16:37,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 14:16:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 14:16:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-21 14:16:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 14:16:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 14:16:37,780 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-21 14:16:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:37,782 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 14:16:37,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:16:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 14:16:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 14:16:37,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:37,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:37,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:16:37,793 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-21 14:16:37,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:37,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017216951] [2020-08-21 14:16:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:16:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:38,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017216951] [2020-08-21 14:16:38,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:38,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:16:38,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60449567] [2020-08-21 14:16:38,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:16:38,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:16:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:16:38,003 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-21 14:16:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:39,141 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-21 14:16:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:16:39,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-21 14:16:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:39,147 INFO L225 Difference]: With dead ends: 612 [2020-08-21 14:16:39,147 INFO L226 Difference]: Without dead ends: 418 [2020-08-21 14:16:39,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:16:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-21 14:16:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-21 14:16:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 14:16:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-21 14:16:39,191 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-21 14:16:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:39,192 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-21 14:16:39,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:16:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-21 14:16:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 14:16:39,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:39,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:39,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:16:39,195 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-21 14:16:39,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:39,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991627491] [2020-08-21 14:16:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:16:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:39,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991627491] [2020-08-21 14:16:39,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:39,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:16:39,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702943574] [2020-08-21 14:16:39,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:39,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:39,413 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-21 14:16:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:40,366 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-21 14:16:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:16:40,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 14:16:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:40,370 INFO L225 Difference]: With dead ends: 727 [2020-08-21 14:16:40,370 INFO L226 Difference]: Without dead ends: 421 [2020-08-21 14:16:40,372 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 [2020-08-21 14:16:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-21 14:16:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-21 14:16:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-21 14:16:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-21 14:16:40,413 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-21 14:16:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:40,415 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-21 14:16:40,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-21 14:16:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 14:16:40,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:40,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:40,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:16:40,417 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-21 14:16:40,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:40,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142153054] [2020-08-21 14:16:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:16:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:40,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142153054] [2020-08-21 14:16:40,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:40,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:16:40,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147044865] [2020-08-21 14:16:40,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:40,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:40,613 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-21 14:16:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:43,153 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-21 14:16:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 14:16:43,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 14:16:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:43,160 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 14:16:43,161 INFO L226 Difference]: Without dead ends: 840 [2020-08-21 14:16:43,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-21 14:16:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-21 14:16:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-21 14:16:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-21 14:16:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-21 14:16:43,240 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-21 14:16:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:43,241 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-21 14:16:43,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-21 14:16:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 14:16:43,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:43,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:43,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:16:43,243 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-21 14:16:43,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:43,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774707191] [2020-08-21 14:16:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:16:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:43,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774707191] [2020-08-21 14:16:43,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:43,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:16:43,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452354276] [2020-08-21 14:16:43,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:43,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:43,429 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-21 14:16:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:44,338 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-21 14:16:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:16:44,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 14:16:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:44,344 INFO L225 Difference]: With dead ends: 1352 [2020-08-21 14:16:44,345 INFO L226 Difference]: Without dead ends: 764 [2020-08-21 14:16:44,348 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 [2020-08-21 14:16:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-21 14:16:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-21 14:16:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-21 14:16:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-21 14:16:44,457 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-21 14:16:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:44,457 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-21 14:16:44,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-21 14:16:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 14:16:44,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:44,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:44,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:16:44,462 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-21 14:16:44,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:44,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623978693] [2020-08-21 14:16:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:16:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:44,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623978693] [2020-08-21 14:16:44,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:44,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:16:44,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927791986] [2020-08-21 14:16:44,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:16:44,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:44,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:16:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:16:44,675 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-21 14:16:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:45,374 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-21 14:16:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:16:45,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-21 14:16:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:45,382 INFO L225 Difference]: With dead ends: 1262 [2020-08-21 14:16:45,382 INFO L226 Difference]: Without dead ends: 814 [2020-08-21 14:16:45,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-21 14:16:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-21 14:16:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-21 14:16:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-21 14:16:45,460 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-21 14:16:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:45,460 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-21 14:16:45,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:16:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-21 14:16:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 14:16:45,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:45,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:45,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:16:45,463 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-21 14:16:45,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:45,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464383269] [2020-08-21 14:16:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:16:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 14:16:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 14:16:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 14:16:45,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464383269] [2020-08-21 14:16:45,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:16:45,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:16:45,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523889086] [2020-08-21 14:16:45,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:45,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:45,649 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-21 14:16:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:48,417 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-21 14:16:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 14:16:48,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-21 14:16:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:48,426 INFO L225 Difference]: With dead ends: 2276 [2020-08-21 14:16:48,426 INFO L226 Difference]: Without dead ends: 1165 [2020-08-21 14:16:48,433 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 [2020-08-21 14:16:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-21 14:16:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-21 14:16:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-21 14:16:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-21 14:16:48,542 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-21 14:16:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:48,543 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-21 14:16:48,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-21 14:16:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 14:16:48,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:48,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:48,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:16:48,547 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:48,547 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-21 14:16:48,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:48,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355991546] [2020-08-21 14:16:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:16:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:16:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 14:16:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 14:16:48,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355991546] [2020-08-21 14:16:48,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:48,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:16:48,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429564294] [2020-08-21 14:16:48,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:16:48,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:16:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:16:48,723 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-21 14:16:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:49,588 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-21 14:16:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:16:49,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-21 14:16:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:49,596 INFO L225 Difference]: With dead ends: 1198 [2020-08-21 14:16:49,597 INFO L226 Difference]: Without dead ends: 1195 [2020-08-21 14:16:49,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:16:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-21 14:16:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-21 14:16:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-21 14:16:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-21 14:16:49,718 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-21 14:16:49,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:49,718 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-21 14:16:49,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:16:49,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-21 14:16:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 14:16:49,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:49,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:49,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:16:49,724 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:49,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:49,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-21 14:16:49,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:49,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991734221] [2020-08-21 14:16:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:16:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:16:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:49,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 14:16:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 14:16:50,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991734221] [2020-08-21 14:16:50,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:16:50,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:16:50,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706444422] [2020-08-21 14:16:50,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:50,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:50,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:50,026 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-21 14:16:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:52,182 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-21 14:16:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:16:52,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-21 14:16:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:52,199 INFO L225 Difference]: With dead ends: 2245 [2020-08-21 14:16:52,199 INFO L226 Difference]: Without dead ends: 2242 [2020-08-21 14:16:52,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:16:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-21 14:16:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-21 14:16:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-21 14:16:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-21 14:16:52,560 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-21 14:16:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:52,561 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-21 14:16:52,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-21 14:16:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 14:16:52,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:52,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:52,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:16:52,576 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-21 14:16:52,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:52,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835773856] [2020-08-21 14:16:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:16:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:16:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:16:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 14:16:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-21 14:16:52,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835773856] [2020-08-21 14:16:52,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:52,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:16:52,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519208393] [2020-08-21 14:16:52,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:16:52,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:52,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:16:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:16:52,841 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-21 14:16:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:53,591 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-21 14:16:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:16:53,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-21 14:16:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:53,605 INFO L225 Difference]: With dead ends: 3453 [2020-08-21 14:16:53,605 INFO L226 Difference]: Without dead ends: 1708 [2020-08-21 14:16:53,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-21 14:16:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-21 14:16:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-21 14:16:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-21 14:16:53,907 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-21 14:16:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:53,908 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-21 14:16:53,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:16:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-21 14:16:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 14:16:53,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:53,915 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:53,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:16:53,915 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-21 14:16:53,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:53,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916462071] [2020-08-21 14:16:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:53,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:16:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:16:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 14:16:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 14:16:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 14:16:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 14:16:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-21 14:16:54,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916462071] [2020-08-21 14:16:54,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:16:54,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:16:54,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376493855] [2020-08-21 14:16:54,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:16:54,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:16:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:16:54,155 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-21 14:16:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:55,973 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-21 14:16:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:16:55,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-21 14:16:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:55,976 INFO L225 Difference]: With dead ends: 1974 [2020-08-21 14:16:55,976 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:16:55,988 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 [2020-08-21 14:16:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:16:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:16:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:16:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:16:55,989 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-21 14:16:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:55,990 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:16:55,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:16:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:16:55,990 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:16:55,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:16:55,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:16:56,617 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 14:17:04,421 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 14:17:05,536 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 14:17:06,717 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 14:17:06,989 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-21 14:17:07,104 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 14:17:08,083 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-21 14:17:08,279 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 14:17:09,594 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-21 14:17:10,398 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-21 14:17:11,190 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-21 14:17:11,583 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-21 14:17:12,704 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 14:17:12,833 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-21 14:17:12,998 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 14:17:16,232 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-21 14:17:16,410 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 14:17:16,954 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-21 14:17:17,340 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-21 14:17:17,693 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 14:17:17,891 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 14:17:22,292 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-21 14:17:22,442 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-21 14:17:24,500 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-21 14:17:25,696 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-21 14:17:27,136 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 178 DAG size of output: 114