/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:43:54,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:43:54,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:43:54,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:43:54,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:43:54,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:43:54,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:43:54,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:43:54,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:43:54,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:43:54,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:43:54,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:43:54,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:43:54,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:43:54,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:43:54,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:43:54,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:43:54,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:43:54,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:43:54,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:43:55,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:43:55,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:43:55,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:43:55,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:43:55,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:43:55,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:43:55,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:43:55,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:43:55,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:43:55,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 03:43:55,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 03:43:55,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 03:43:55,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 03:43:55,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 03:43:55,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 03:43:55,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 03:43:55,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 03:43:55,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 03:43:55,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:43:55,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:43:55,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:43:55,016 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 03:43:55,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:43:55,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:43:55,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:43:55,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:43:55,043 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:43:55,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:43:55,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:43:55,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:43:55,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:43:55,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:43:55,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:43:55,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:43:55,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:43:55,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:43:55,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:43:55,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:43:55,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:43:55,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:43:55,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:43:55,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:43:55,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:43:55,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:43:55,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:43:55,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:43:55,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:43:55,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:43:55,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:43:55,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:43:55,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:43:55,049 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=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:43:55,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:43:55,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:43:55,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:43:55,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:43:55,398 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:43:55,399 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-19 03:43:55,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c839b683d/ff5930ccf4e04b4b9d30fb0c0a400005/FLAGcb9a28962 [2020-08-19 03:43:55,928 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:43:55,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-19 03:43:55,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c839b683d/ff5930ccf4e04b4b9d30fb0c0a400005/FLAGcb9a28962 [2020-08-19 03:43:56,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c839b683d/ff5930ccf4e04b4b9d30fb0c0a400005 [2020-08-19 03:43:56,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:43:56,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:43:56,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:43:56,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:43:56,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:43:56,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e20dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56, skipping insertion in model container [2020-08-19 03:43:56,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:43:56,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:43:56,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:43:56,657 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:43:56,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:43:56,803 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:43:56,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56 WrapperNode [2020-08-19 03:43:56,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:43:56,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:43:56,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:43:56,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:43:56,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (1/1) ... [2020-08-19 03:43:56,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:43:56,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:43:56,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:43:56,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:43:56,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (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 03:43:56,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:43:56,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:43:56,910 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-19 03:43:56,910 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2020-08-19 03:43:56,910 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-19 03:43:56,910 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-19 03:43:56,910 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-19 03:43:56,911 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-19 03:43:56,911 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-19 03:43:56,911 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-19 03:43:56,911 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-19 03:43:56,911 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-19 03:43:56,911 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-19 03:43:56,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-19 03:43:56,912 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-19 03:43:56,912 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-19 03:43:56,913 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-19 03:43:56,913 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-19 03:43:56,913 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-19 03:43:56,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:43:56,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:43:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:43:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-19 03:43:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2020-08-19 03:43:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-19 03:43:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-19 03:43:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-19 03:43:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-19 03:43:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-19 03:43:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-19 03:43:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-19 03:43:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-19 03:43:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-19 03:43:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-19 03:43:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-19 03:43:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-19 03:43:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-19 03:43:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-19 03:43:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-19 03:43:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:43:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:43:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:43:57,341 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:43:57,342 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 03:43:57,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:43:57 BoogieIcfgContainer [2020-08-19 03:43:57,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:43:57,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:43:57,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:43:57,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:43:57,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:43:56" (1/3) ... [2020-08-19 03:43:57,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dddbd73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:43:57, skipping insertion in model container [2020-08-19 03:43:57,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:56" (2/3) ... [2020-08-19 03:43:57,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dddbd73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:43:57, skipping insertion in model container [2020-08-19 03:43:57,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:43:57" (3/3) ... [2020-08-19 03:43:57,358 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-08-19 03:43:57,368 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:43:57,376 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:43:57,400 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:43:57,429 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:43:57,429 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:43:57,429 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:43:57,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:43:57,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:43:57,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:43:57,430 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:43:57,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:43:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-08-19 03:43:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 03:43:57,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:43:57,465 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] [2020-08-19 03:43:57,466 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:43:57,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:43:57,472 INFO L82 PathProgramCache]: Analyzing trace with hash 742963907, now seen corresponding path program 1 times [2020-08-19 03:43:57,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:43:57,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724288058] [2020-08-19 03:43:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:43:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:43:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:43:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:43:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 03:43:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:43:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 03:43:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:43:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:43:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 03:43:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 03:43:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:43:58,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724288058] [2020-08-19 03:43:58,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:43:58,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 03:43:58,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339129770] [2020-08-19 03:43:58,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:43:58,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:43:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:43:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:43:58,271 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 10 states. [2020-08-19 03:44:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:00,847 INFO L93 Difference]: Finished difference Result 552 states and 918 transitions. [2020-08-19 03:44:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:44:00,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-19 03:44:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:00,878 INFO L225 Difference]: With dead ends: 552 [2020-08-19 03:44:00,878 INFO L226 Difference]: Without dead ends: 416 [2020-08-19 03:44:00,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:44:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-19 03:44:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 234. [2020-08-19 03:44:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-19 03:44:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 306 transitions. [2020-08-19 03:44:01,002 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 306 transitions. Word has length 70 [2020-08-19 03:44:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:01,002 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 306 transitions. [2020-08-19 03:44:01,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:44:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 306 transitions. [2020-08-19 03:44:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 03:44:01,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:01,007 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] [2020-08-19 03:44:01,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:44:01,008 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1190139517, now seen corresponding path program 1 times [2020-08-19 03:44:01,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:01,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003911878] [2020-08-19 03:44:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 03:44:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:44:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 03:44:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 03:44:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 03:44:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,274 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 03:44:01,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003911878] [2020-08-19 03:44:01,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:01,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 03:44:01,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649417894] [2020-08-19 03:44:01,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:44:01,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:44:01,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:44:01,279 INFO L87 Difference]: Start difference. First operand 234 states and 306 transitions. Second operand 10 states. [2020-08-19 03:44:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:04,152 INFO L93 Difference]: Finished difference Result 805 states and 1159 transitions. [2020-08-19 03:44:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 03:44:04,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-19 03:44:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:04,160 INFO L225 Difference]: With dead ends: 805 [2020-08-19 03:44:04,160 INFO L226 Difference]: Without dead ends: 598 [2020-08-19 03:44:04,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2020-08-19 03:44:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-08-19 03:44:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 360. [2020-08-19 03:44:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 03:44:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2020-08-19 03:44:04,229 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 70 [2020-08-19 03:44:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:04,230 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2020-08-19 03:44:04,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:44:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2020-08-19 03:44:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 03:44:04,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:04,234 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] [2020-08-19 03:44:04,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:44:04,235 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1543227899, now seen corresponding path program 1 times [2020-08-19 03:44:04,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:04,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51168265] [2020-08-19 03:44:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 03:44:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:44:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 03:44:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 03:44:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 03:44:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,470 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 03:44:04,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51168265] [2020-08-19 03:44:04,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:04,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-19 03:44:04,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188541936] [2020-08-19 03:44:04,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 03:44:04,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 03:44:04,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 03:44:04,473 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand 11 states. [2020-08-19 03:44:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:06,018 INFO L93 Difference]: Finished difference Result 858 states and 1207 transitions. [2020-08-19 03:44:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 03:44:06,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-19 03:44:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:06,025 INFO L225 Difference]: With dead ends: 858 [2020-08-19 03:44:06,025 INFO L226 Difference]: Without dead ends: 541 [2020-08-19 03:44:06,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-08-19 03:44:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-19 03:44:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 365. [2020-08-19 03:44:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-08-19 03:44:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 479 transitions. [2020-08-19 03:44:06,077 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 479 transitions. Word has length 70 [2020-08-19 03:44:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:06,078 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 479 transitions. [2020-08-19 03:44:06,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 03:44:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 479 transitions. [2020-08-19 03:44:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 03:44:06,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:06,081 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] [2020-08-19 03:44:06,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:44:06,082 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:06,090 INFO L82 PathProgramCache]: Analyzing trace with hash 507756099, now seen corresponding path program 1 times [2020-08-19 03:44:06,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:06,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362551800] [2020-08-19 03:44:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 03:44:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:44:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 03:44:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 03:44:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 03:44:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,334 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 03:44:06,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362551800] [2020-08-19 03:44:06,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:06,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 03:44:06,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74924228] [2020-08-19 03:44:06,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:44:06,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:06,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:44:06,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:44:06,337 INFO L87 Difference]: Start difference. First operand 365 states and 479 transitions. Second operand 10 states. [2020-08-19 03:44:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:08,943 INFO L93 Difference]: Finished difference Result 1300 states and 1859 transitions. [2020-08-19 03:44:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 03:44:08,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-19 03:44:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:08,952 INFO L225 Difference]: With dead ends: 1300 [2020-08-19 03:44:08,952 INFO L226 Difference]: Without dead ends: 978 [2020-08-19 03:44:08,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:44:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-08-19 03:44:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 691. [2020-08-19 03:44:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-08-19 03:44:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 892 transitions. [2020-08-19 03:44:09,063 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 892 transitions. Word has length 70 [2020-08-19 03:44:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:09,064 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 892 transitions. [2020-08-19 03:44:09,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:44:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 892 transitions. [2020-08-19 03:44:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 03:44:09,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:09,068 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] [2020-08-19 03:44:09,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:44:09,068 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1263714876, now seen corresponding path program 1 times [2020-08-19 03:44:09,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:09,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130465240] [2020-08-19 03:44:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 03:44:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:44:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 03:44:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 03:44:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 03:44:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,314 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 03:44:09,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130465240] [2020-08-19 03:44:09,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:09,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-19 03:44:09,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497143259] [2020-08-19 03:44:09,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 03:44:09,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 03:44:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 03:44:09,317 INFO L87 Difference]: Start difference. First operand 691 states and 892 transitions. Second operand 11 states. [2020-08-19 03:44:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:10,989 INFO L93 Difference]: Finished difference Result 1616 states and 2202 transitions. [2020-08-19 03:44:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 03:44:10,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-19 03:44:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:10,999 INFO L225 Difference]: With dead ends: 1616 [2020-08-19 03:44:10,999 INFO L226 Difference]: Without dead ends: 968 [2020-08-19 03:44:11,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-19 03:44:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-19 03:44:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 706. [2020-08-19 03:44:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-08-19 03:44:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 904 transitions. [2020-08-19 03:44:11,075 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 904 transitions. Word has length 70 [2020-08-19 03:44:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:11,076 INFO L479 AbstractCegarLoop]: Abstraction has 706 states and 904 transitions. [2020-08-19 03:44:11,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 03:44:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 904 transitions. [2020-08-19 03:44:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 03:44:11,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:11,079 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] [2020-08-19 03:44:11,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:44:11,079 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1123166266, now seen corresponding path program 1 times [2020-08-19 03:44:11,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:11,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906142157] [2020-08-19 03:44:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 03:44:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:44:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 03:44:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 03:44:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 03:44:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,323 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 03:44:11,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906142157] [2020-08-19 03:44:11,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:11,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 03:44:11,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375941583] [2020-08-19 03:44:11,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:44:11,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:11,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:44:11,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:44:11,327 INFO L87 Difference]: Start difference. First operand 706 states and 904 transitions. Second operand 10 states. [2020-08-19 03:44:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:13,914 INFO L93 Difference]: Finished difference Result 1675 states and 2255 transitions. [2020-08-19 03:44:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 03:44:13,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-19 03:44:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:13,926 INFO L225 Difference]: With dead ends: 1675 [2020-08-19 03:44:13,926 INFO L226 Difference]: Without dead ends: 1111 [2020-08-19 03:44:13,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-08-19 03:44:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-19 03:44:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 722. [2020-08-19 03:44:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-08-19 03:44:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 913 transitions. [2020-08-19 03:44:14,003 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 913 transitions. Word has length 70 [2020-08-19 03:44:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:14,003 INFO L479 AbstractCegarLoop]: Abstraction has 722 states and 913 transitions. [2020-08-19 03:44:14,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:44:14,004 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 913 transitions. [2020-08-19 03:44:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 03:44:14,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:14,005 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] [2020-08-19 03:44:14,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:44:14,006 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1940814716, now seen corresponding path program 1 times [2020-08-19 03:44:14,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:14,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438796] [2020-08-19 03:44:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 03:44:14,025 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 03:44:14,025 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 03:44:14,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:44:14,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:44:14 BoogieIcfgContainer [2020-08-19 03:44:14,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:44:14,075 INFO L168 Benchmark]: Toolchain (without parser) took 17751.77 ms. Allocated memory was 139.5 MB in the beginning and 444.1 MB in the end (delta: 304.6 MB). Free memory was 102.6 MB in the beginning and 244.5 MB in the end (delta: -141.9 MB). Peak memory consumption was 162.7 MB. Max. memory is 7.1 GB. [2020-08-19 03:44:14,077 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 03:44:14,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 479.03 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 102.4 MB in the beginning and 178.5 MB in the end (delta: -76.1 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:44:14,085 INFO L168 Benchmark]: Boogie Preprocessor took 42.26 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 176.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:44:14,085 INFO L168 Benchmark]: RCFGBuilder took 501.95 ms. Allocated memory is still 201.3 MB. Free memory was 176.4 MB in the beginning and 144.5 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:44:14,087 INFO L168 Benchmark]: TraceAbstraction took 16721.16 ms. Allocated memory was 201.3 MB in the beginning and 444.1 MB in the end (delta: 242.7 MB). Free memory was 143.8 MB in the beginning and 244.5 MB in the end (delta: -100.7 MB). Peak memory consumption was 142.1 MB. Max. memory is 7.1 GB. [2020-08-19 03:44:14,099 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 479.03 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 102.4 MB in the beginning and 178.5 MB in the end (delta: -76.1 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.26 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 176.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 501.95 ms. Allocated memory is still 201.3 MB. Free memory was 176.4 MB in the beginning and 144.5 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16721.16 ms. Allocated memory was 201.3 MB in the beginning and 444.1 MB in the end (delta: 242.7 MB). Free memory was 143.8 MB in the beginning and 244.5 MB in the end (delta: -100.7 MB). Peak memory consumption was 142.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int q_buf_0 ; [L16] int q_free ; [L17] int q_read_ev ; [L18] int q_write_ev ; [L19] int q_req_up ; [L20] int q_ev ; [L41] int p_num_write ; [L42] int p_last_write ; [L43] int p_dw_st ; [L44] int p_dw_pc ; [L45] int p_dw_i ; [L46] int c_num_read ; [L47] int c_last_read ; [L48] int c_dr_st ; [L49] int c_dr_pc ; [L50] int c_dr_i ; [L154] static int a_t ; [L456] int __retres1 ; [L460] CALL init_model() [L442] q_free = 1 [L443] q_write_ev = 2 [L444] q_read_ev = q_write_ev [L445] p_num_write = 0 [L446] p_dw_pc = 0 [L447] p_dw_i = 1 [L448] c_num_read = 0 [L449] c_dr_pc = 0 [L450] c_dr_i = 1 [L460] RET init_model() [L461] CALL start_simulation() [L396] int kernel_st ; [L397] int tmp ; [L401] kernel_st = 0 [L402] CALL update_channels() [L212] COND FALSE !((int )q_req_up == 1) [L402] RET update_channels() [L403] CALL init_threads() [L227] COND TRUE (int )p_dw_i == 1 [L228] p_dw_st = 0 [L232] COND TRUE (int )c_dr_i == 1 [L233] c_dr_st = 0 [L403] RET init_threads() [L404] CALL fire_delta_events() [L265] COND FALSE !((int )q_read_ev == 0) [L270] COND FALSE !((int )q_write_ev == 0) [L404] RET fire_delta_events() [L405] CALL activate_threads() [L298] int tmp ; [L299] int tmp___0 ; [L303] CALL, EXPR is_do_write_p_triggered() [L52] int __retres1 ; [L55] COND FALSE !((int )p_dw_pc == 1) [L65] __retres1 = 0 [L67] return (__retres1); [L303] RET, EXPR is_do_write_p_triggered() [L303] tmp = is_do_write_p_triggered() [L305] COND FALSE !(\read(tmp)) [L311] CALL, EXPR is_do_read_c_triggered() [L71] int __retres1 ; [L74] COND FALSE !((int )c_dr_pc == 1) [L84] __retres1 = 0 [L86] return (__retres1); [L311] RET, EXPR is_do_read_c_triggered() [L311] tmp___0 = is_do_read_c_triggered() [L313] COND FALSE !(\read(tmp___0)) [L405] RET activate_threads() [L406] CALL reset_delta_events() [L283] COND FALSE !((int )q_read_ev == 1) [L288] COND FALSE !((int )q_write_ev == 1) [L406] RET reset_delta_events() [L409] COND TRUE 1 [L412] kernel_st = 1 [L413] CALL eval() [L323] int tmp ; [L324] int tmp___0 ; [L325] int tmp___1 ; [L329] COND TRUE 1 [L332] CALL, EXPR exists_runnable_thread() [L242] int __retres1 ; [L245] COND TRUE (int )p_dw_st == 0 [L246] __retres1 = 1 [L258] return (__retres1); [L332] RET, EXPR exists_runnable_thread() [L332] tmp___1 = exists_runnable_thread() [L334] COND TRUE \read(tmp___1) [L339] COND TRUE (int )p_dw_st == 0 [L341] tmp = __VERIFIER_nondet_int() [L343] COND FALSE !(\read(tmp)) [L349] CALL error() [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 20 procedures, 140 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.6s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 13.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 986 SDtfs, 3575 SDslu, 1134 SDs, 0 SdLazy, 8324 SolverSat, 2232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=722occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 6 MinimizatonAttempts, 1534 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 490 NumberOfCodeBlocks, 490 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 91356 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...