/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:06:56,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:06:56,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:06:56,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:06:56,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:06:56,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:06:56,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:06:56,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:06:56,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:06:56,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:06:56,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:06:56,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:06:56,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:06:56,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:06:56,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:06:56,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:06:56,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:06:56,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:06:56,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:06:56,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:06:56,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:06:56,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:06:56,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:06:56,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:06:56,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:06:56,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:06:56,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:06:56,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:06:56,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:06:56,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 02:06:56,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 02:06:56,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 02:06:56,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 02:06:56,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 02:06:56,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 02:06:56,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 02:06:56,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 02:06:56,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 02:06:56,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:06:56,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:06:56,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:06:56,622 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 [2020-08-19 02:06:56,662 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:06:56,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:06:56,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:06:56,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:06:56,664 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:06:56,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:06:56,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:06:56,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:06:56,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:06:56,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:06:56,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:06:56,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:06:56,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:06:56,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:06:56,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:06:56,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:06:56,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:06:56,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:06:56,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:06:56,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:06:56,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:06:56,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:06:56,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:06:56,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:06:56,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:06:56,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:06:56,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:06:56,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:06:56,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:06:56,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 02:06:56,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:06:56,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:06:57,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:06:57,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:06:57,004 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:06:57,005 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 02:06:57,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e6b28fbb/2284d1e8bb7c4cc59cd8a33a3311937d/FLAG45ca92ac4 [2020-08-19 02:06:57,530 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:06:57,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 02:06:57,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e6b28fbb/2284d1e8bb7c4cc59cd8a33a3311937d/FLAG45ca92ac4 [2020-08-19 02:06:57,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e6b28fbb/2284d1e8bb7c4cc59cd8a33a3311937d [2020-08-19 02:06:57,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:06:57,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:06:57,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:06:57,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:06:57,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:06:57,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:06:57" (1/1) ... [2020-08-19 02:06:57,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f95c578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:57, skipping insertion in model container [2020-08-19 02:06:57,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:06:57" (1/1) ... [2020-08-19 02:06:57,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:06:57,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:06:58,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:06:58,110 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:06:58,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:06:58,163 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:06:58,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58 WrapperNode [2020-08-19 02:06:58,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:06:58,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:06:58,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:06:58,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:06:58,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (1/1) ... [2020-08-19 02:06:58,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (1/1) ... [2020-08-19 02:06:58,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (1/1) ... [2020-08-19 02:06:58,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (1/1) ... [2020-08-19 02:06:58,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (1/1) ... [2020-08-19 02:06:58,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (1/1) ... [2020-08-19 02:06:58,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (1/1) ... [2020-08-19 02:06:58,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:06:58,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:06:58,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:06:58,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:06:58,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (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 [2020-08-19 02:06:58,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:06:58,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:06:58,354 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-19 02:06:58,354 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-19 02:06:58,354 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-19 02:06:58,354 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-19 02:06:58,354 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-19 02:06:58,354 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-19 02:06:58,355 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-19 02:06:58,355 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-19 02:06:58,355 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-19 02:06:58,355 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-19 02:06:58,355 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-19 02:06:58,355 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-19 02:06:58,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:06:58,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:06:58,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:06:58,356 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-19 02:06:58,356 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-19 02:06:58,356 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-19 02:06:58,356 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-19 02:06:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-19 02:06:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-19 02:06:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-19 02:06:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-19 02:06:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-19 02:06:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-19 02:06:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-19 02:06:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-19 02:06:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:06:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:06:58,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:06:58,701 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:06:58,701 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 02:06:58,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:06:58 BoogieIcfgContainer [2020-08-19 02:06:58,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:06:58,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:06:58,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:06:58,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:06:58,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:06:57" (1/3) ... [2020-08-19 02:06:58,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6064de33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:06:58, skipping insertion in model container [2020-08-19 02:06:58,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:06:58" (2/3) ... [2020-08-19 02:06:58,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6064de33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:06:58, skipping insertion in model container [2020-08-19 02:06:58,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:06:58" (3/3) ... [2020-08-19 02:06:58,714 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-19 02:06:58,725 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:06:58,741 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:06:58,765 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:06:58,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:06:58,791 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:06:58,791 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:06:58,791 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:06:58,791 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:06:58,791 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:06:58,791 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:06:58,792 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:06:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-19 02:06:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 02:06:58,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:06:58,823 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] [2020-08-19 02:06:58,823 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:06:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:06:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-19 02:06:58,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:06:58,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376426539] [2020-08-19 02:06:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:06:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:06:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:06:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:06:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:06:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:06:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:06:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:06:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:06:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:06:59,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376426539] [2020-08-19 02:06:59,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:06:59,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 02:06:59,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61999003] [2020-08-19 02:06:59,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:06:59,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:06:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:06:59,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:06:59,345 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-19 02:07:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:00,376 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-19 02:07:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:07:00,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-19 02:07:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:00,394 INFO L225 Difference]: With dead ends: 356 [2020-08-19 02:07:00,394 INFO L226 Difference]: Without dead ends: 248 [2020-08-19 02:07:00,400 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 [2020-08-19 02:07:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-19 02:07:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-19 02:07:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 02:07:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-19 02:07:00,487 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-19 02:07:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:00,488 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-19 02:07:00,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:07:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-19 02:07:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:07:00,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:00,494 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] [2020-08-19 02:07:00,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:07:00,494 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-19 02:07:00,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:00,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213351962] [2020-08-19 02:07:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:07:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:00,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213351962] [2020-08-19 02:07:00,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:00,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 02:07:00,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828748170] [2020-08-19 02:07:00,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:07:00,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:00,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:07:00,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:07:00,702 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-19 02:07:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:01,333 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-19 02:07:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:07:01,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-19 02:07:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:01,344 INFO L225 Difference]: With dead ends: 406 [2020-08-19 02:07:01,345 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 02:07:01,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:07:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 02:07:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-19 02:07:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-19 02:07:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-19 02:07:01,420 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-19 02:07:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:01,420 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-19 02:07:01,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:07:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-19 02:07:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 02:07:01,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:01,423 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] [2020-08-19 02:07:01,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:07:01,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:01,428 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-19 02:07:01,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:01,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636590223] [2020-08-19 02:07:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:07:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 02:07:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:01,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636590223] [2020-08-19 02:07:01,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:01,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 02:07:01,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569011083] [2020-08-19 02:07:01,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:07:01,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:07:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:07:01,659 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-19 02:07:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:02,862 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-19 02:07:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:07:02,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-19 02:07:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:02,868 INFO L225 Difference]: With dead ends: 582 [2020-08-19 02:07:02,869 INFO L226 Difference]: Without dead ends: 417 [2020-08-19 02:07:02,870 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 [2020-08-19 02:07:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-19 02:07:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-19 02:07:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-19 02:07:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-19 02:07:02,940 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-19 02:07:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:02,940 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-19 02:07:02,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:07:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-19 02:07:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 02:07:02,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:02,943 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] [2020-08-19 02:07:02,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:07:02,944 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-19 02:07:02,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:02,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987993630] [2020-08-19 02:07:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:07:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 02:07:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:03,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987993630] [2020-08-19 02:07:03,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:03,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-19 02:07:03,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785509382] [2020-08-19 02:07:03,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:07:03,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:07:03,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:07:03,155 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-19 02:07:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:05,980 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-19 02:07:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 02:07:05,981 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-19 02:07:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:05,988 INFO L225 Difference]: With dead ends: 873 [2020-08-19 02:07:05,988 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 02:07:05,992 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 [2020-08-19 02:07:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 02:07:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-19 02:07:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-19 02:07:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-19 02:07:06,047 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-19 02:07:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:06,047 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-19 02:07:06,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:07:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-19 02:07:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:07:06,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:06,049 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] [2020-08-19 02:07:06,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:07:06,059 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:06,059 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-19 02:07:06,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:06,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208636476] [2020-08-19 02:07:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:07:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:06,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208636476] [2020-08-19 02:07:06,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:06,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 02:07:06,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781165] [2020-08-19 02:07:06,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:07:06,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:07:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:07:06,242 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-19 02:07:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:07,326 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-19 02:07:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:07:07,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-19 02:07:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:07,331 INFO L225 Difference]: With dead ends: 612 [2020-08-19 02:07:07,331 INFO L226 Difference]: Without dead ends: 418 [2020-08-19 02:07:07,333 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 [2020-08-19 02:07:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-19 02:07:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-19 02:07:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-19 02:07:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-19 02:07:07,374 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-19 02:07:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:07,374 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-19 02:07:07,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:07:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-19 02:07:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:07:07,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:07,376 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] [2020-08-19 02:07:07,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:07:07,377 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-19 02:07:07,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:07,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62727242] [2020-08-19 02:07:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:07:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:07,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62727242] [2020-08-19 02:07:07,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:07,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 02:07:07,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326522216] [2020-08-19 02:07:07,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:07:07,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:07,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:07:07,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:07:07,562 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-19 02:07:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:08,407 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-19 02:07:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:07:08,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 02:07:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:08,415 INFO L225 Difference]: With dead ends: 727 [2020-08-19 02:07:08,415 INFO L226 Difference]: Without dead ends: 421 [2020-08-19 02:07:08,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:07:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-19 02:07:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-19 02:07:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-19 02:07:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-19 02:07:08,466 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-19 02:07:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:08,467 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-19 02:07:08,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:07:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-19 02:07:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:07:08,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:08,469 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] [2020-08-19 02:07:08,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:07:08,469 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:08,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-19 02:07:08,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:08,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599306859] [2020-08-19 02:07:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:07:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:08,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599306859] [2020-08-19 02:07:08,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:08,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 02:07:08,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927817671] [2020-08-19 02:07:08,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:07:08,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:08,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:07:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:07:08,701 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-19 02:07:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:11,281 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-19 02:07:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 02:07:11,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 02:07:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:11,287 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 02:07:11,287 INFO L226 Difference]: Without dead ends: 840 [2020-08-19 02:07:11,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-19 02:07:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-19 02:07:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-19 02:07:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-19 02:07:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-19 02:07:11,357 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-19 02:07:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:11,357 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-19 02:07:11,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:07:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-19 02:07:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:07:11,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:11,358 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] [2020-08-19 02:07:11,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:07:11,359 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-19 02:07:11,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:11,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21281079] [2020-08-19 02:07:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:07:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:11,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21281079] [2020-08-19 02:07:11,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:11,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 02:07:11,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088449634] [2020-08-19 02:07:11,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:07:11,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:07:11,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:07:11,528 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-19 02:07:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:12,398 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-19 02:07:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:07:12,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 02:07:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:12,403 INFO L225 Difference]: With dead ends: 1352 [2020-08-19 02:07:12,403 INFO L226 Difference]: Without dead ends: 764 [2020-08-19 02:07:12,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:07:12,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-19 02:07:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-19 02:07:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-19 02:07:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-19 02:07:12,480 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-19 02:07:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:12,481 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-19 02:07:12,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:07:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-19 02:07:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:07:12,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:12,484 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] [2020-08-19 02:07:12,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:07:12,485 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-19 02:07:12,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:12,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468898150] [2020-08-19 02:07:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:07:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:07:12,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468898150] [2020-08-19 02:07:12,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:12,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 02:07:12,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168988351] [2020-08-19 02:07:12,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:07:12,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:12,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:07:12,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:07:12,640 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-19 02:07:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:13,273 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-19 02:07:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:07:13,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-19 02:07:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:13,279 INFO L225 Difference]: With dead ends: 1262 [2020-08-19 02:07:13,279 INFO L226 Difference]: Without dead ends: 814 [2020-08-19 02:07:13,281 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 [2020-08-19 02:07:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-19 02:07:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-19 02:07:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-19 02:07:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-19 02:07:13,365 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-19 02:07:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:13,366 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-19 02:07:13,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:07:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-19 02:07:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 02:07:13,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:13,368 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] [2020-08-19 02:07:13,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:07:13,368 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:13,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-19 02:07:13,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:13,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747441425] [2020-08-19 02:07:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 02:07:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 02:07:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 02:07:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:07:13,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747441425] [2020-08-19 02:07:13,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:07:13,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:07:13,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218075362] [2020-08-19 02:07:13,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:07:13,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:07:13,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:07:13,543 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-19 02:07:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:15,983 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-19 02:07:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 02:07:15,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-19 02:07:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:15,991 INFO L225 Difference]: With dead ends: 2276 [2020-08-19 02:07:15,991 INFO L226 Difference]: Without dead ends: 1165 [2020-08-19 02:07:15,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 02:07:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-19 02:07:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-19 02:07:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-19 02:07:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-19 02:07:16,143 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-19 02:07:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:16,144 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-19 02:07:16,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:07:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-19 02:07:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 02:07:16,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:16,147 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] [2020-08-19 02:07:16,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:07:16,147 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-19 02:07:16,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:16,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844380866] [2020-08-19 02:07:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:07:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 02:07:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 02:07:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 02:07:16,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844380866] [2020-08-19 02:07:16,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:16,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 02:07:16,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248992880] [2020-08-19 02:07:16,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:07:16,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:07:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:07:16,313 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-19 02:07:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:17,095 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-19 02:07:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:07:17,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-19 02:07:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:17,105 INFO L225 Difference]: With dead ends: 1198 [2020-08-19 02:07:17,106 INFO L226 Difference]: Without dead ends: 1195 [2020-08-19 02:07:17,107 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 [2020-08-19 02:07:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-19 02:07:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-19 02:07:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-19 02:07:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-19 02:07:17,299 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-19 02:07:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:17,300 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-19 02:07:17,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:07:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-19 02:07:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-19 02:07:17,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:17,304 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] [2020-08-19 02:07:17,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:07:17,304 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-19 02:07:17,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:17,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193215851] [2020-08-19 02:07:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:07:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 02:07:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 02:07:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 02:07:17,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193215851] [2020-08-19 02:07:17,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:07:17,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:07:17,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230216680] [2020-08-19 02:07:17,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:07:17,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:17,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:07:17,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:07:17,560 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-19 02:07:19,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:19,510 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-19 02:07:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 02:07:19,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-19 02:07:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:19,528 INFO L225 Difference]: With dead ends: 2245 [2020-08-19 02:07:19,528 INFO L226 Difference]: Without dead ends: 2242 [2020-08-19 02:07:19,530 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 [2020-08-19 02:07:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-19 02:07:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-19 02:07:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-19 02:07:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-19 02:07:19,813 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-19 02:07:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:19,814 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-19 02:07:19,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:07:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-19 02:07:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-19 02:07:19,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:19,821 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] [2020-08-19 02:07:19,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:07:19,822 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-19 02:07:19,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:19,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409298056] [2020-08-19 02:07:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:07:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 02:07:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 02:07:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 02:07:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:19,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-19 02:07:20,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409298056] [2020-08-19 02:07:20,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:07:20,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 02:07:20,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431164375] [2020-08-19 02:07:20,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:07:20,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:07:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:07:20,041 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-19 02:07:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:20,747 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-19 02:07:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:07:20,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-19 02:07:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:20,760 INFO L225 Difference]: With dead ends: 3453 [2020-08-19 02:07:20,761 INFO L226 Difference]: Without dead ends: 1708 [2020-08-19 02:07:20,777 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 [2020-08-19 02:07:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-19 02:07:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-19 02:07:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-19 02:07:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-19 02:07:20,950 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-19 02:07:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:20,950 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-19 02:07:20,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:07:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-19 02:07:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-19 02:07:20,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:07:20,956 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] [2020-08-19 02:07:20,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:07:20,957 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:07:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:07:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-19 02:07:20,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:07:20,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628931798] [2020-08-19 02:07:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:07:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:07:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:07:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:07:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:07:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:07:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 02:07:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:07:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 02:07:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:07:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-19 02:07:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 02:07:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:07:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:07:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-19 02:07:21,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628931798] [2020-08-19 02:07:21,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:07:21,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:07:21,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562212007] [2020-08-19 02:07:21,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:07:21,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:07:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:07:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:07:21,224 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-19 02:07:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:07:22,736 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-19 02:07:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 02:07:22,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-19 02:07:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:07:22,742 INFO L225 Difference]: With dead ends: 1974 [2020-08-19 02:07:22,743 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:07:22,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-19 02:07:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:07:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:07:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:07:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:07:22,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-19 02:07:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:07:22,756 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:07:22,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:07:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:07:22,756 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:07:22,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:07:22,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:07:23,278 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 02:07:30,365 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 02:07:31,444 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 02:07:32,572 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 02:07:32,829 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-19 02:07:32,955 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 02:07:33,923 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-19 02:07:34,117 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 02:07:35,406 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-19 02:07:36,173 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-19 02:07:36,965 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-19 02:07:37,350 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-19 02:07:38,448 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 02:07:38,571 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-19 02:07:38,712 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 02:07:41,838 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-19 02:07:42,005 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 02:07:42,548 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-19 02:07:42,920 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-19 02:07:43,247 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 02:07:43,456 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 02:07:47,699 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-19 02:07:47,839 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-19 02:07:49,802 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-19 02:07:50,983 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-19 02:07:52,310 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-19 02:07:52,477 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 02:07:53,506 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 209 DAG size of output: 93 [2020-08-19 02:07:53,698 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 02:07:56,837 WARN L193 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-19 02:07:57,164 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-08-19 02:07:57,366 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2020-08-19 02:07:58,121 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 69 [2020-08-19 02:07:58,339 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62