/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:04:42,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:04:42,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:04:42,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:04:42,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:04:42,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:04:42,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:04:42,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:04:42,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:04:42,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:04:42,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:04:42,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:04:42,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:04:42,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:04:42,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:04:42,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:04:42,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:04:42,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:04:42,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:04:42,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:04:42,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:04:42,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:04:42,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:04:42,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:04:42,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:04:42,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:04:42,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:04:42,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:04:42,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:04:42,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:04:42,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:04:42,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:04:42,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:04:42,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:04:42,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:04:42,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:04:42,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:04:42,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:04:42,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:04:42,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:04:42,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:04:42,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:04:42,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:04:42,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:04:42,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:04:42,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:04:42,589 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:04:42,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:04:42,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:04:42,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:04:42,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:04:42,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:04:42,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:04:42,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:04:42,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:04:42,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:04:42,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:04:42,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:04:42,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:04:42,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:04:42,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:04:42,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:04:42,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:04:42,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:04:42,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:04:42,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:04:42,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:04:42,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:04:42,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:04:42,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:04:42,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:04:42,594 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:04:42,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:04:42,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:04:42,882 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:04:42,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:04:42,884 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:04:42,885 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-21 15:04:42,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f702f7d33/a7a5f1a61ed341ffbd1687a1e973b112/FLAGfad185b5e [2020-08-21 15:04:43,354 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:04:43,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-21 15:04:43,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f702f7d33/a7a5f1a61ed341ffbd1687a1e973b112/FLAGfad185b5e [2020-08-21 15:04:43,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f702f7d33/a7a5f1a61ed341ffbd1687a1e973b112 [2020-08-21 15:04:43,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:04:43,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:04:43,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:43,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:04:43,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:04:43,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:43" (1/1) ... [2020-08-21 15:04:43,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de13521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:43, skipping insertion in model container [2020-08-21 15:04:43,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:43" (1/1) ... [2020-08-21 15:04:43,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:04:43,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:04:44,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:44,007 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:04:44,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:44,172 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:04:44,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44 WrapperNode [2020-08-21 15:04:44,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:44,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:04:44,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:04:44,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:04:44,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:04:44,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:04:44,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:04:44,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:04:44,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:04:44,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:04:44,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:04:44,327 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 15:04:44,328 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2020-08-21 15:04:44,328 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 15:04:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 15:04:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 15:04:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 15:04:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 15:04:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-21 15:04:44,330 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 15:04:44,330 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 15:04:44,330 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-21 15:04:44,331 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-21 15:04:44,331 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-21 15:04:44,332 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 15:04:44,332 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 15:04:44,332 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 15:04:44,332 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 15:04:44,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:04:44,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:04:44,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:04:44,333 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 15:04:44,333 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2020-08-21 15:04:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 15:04:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 15:04:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 15:04:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 15:04:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 15:04:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-21 15:04:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 15:04:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 15:04:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-21 15:04:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-21 15:04:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-21 15:04:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 15:04:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 15:04:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 15:04:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 15:04:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:04:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:04:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:04:44,814 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:04:44,815 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 15:04:44,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:44 BoogieIcfgContainer [2020-08-21 15:04:44,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:04:44,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:04:44,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:04:44,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:04:44,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:04:43" (1/3) ... [2020-08-21 15:04:44,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b45bf81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:44, skipping insertion in model container [2020-08-21 15:04:44,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (2/3) ... [2020-08-21 15:04:44,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b45bf81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:44, skipping insertion in model container [2020-08-21 15:04:44,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:44" (3/3) ... [2020-08-21 15:04:44,841 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-08-21 15:04:44,857 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:04:44,874 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:04:44,888 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:04:44,916 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:04:44,917 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:04:44,917 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:04:44,917 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:04:44,917 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:04:44,917 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:04:44,918 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:04:44,918 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:04:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-08-21 15:04:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 15:04:44,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:44,954 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] [2020-08-21 15:04:44,955 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:44,960 INFO L82 PathProgramCache]: Analyzing trace with hash 742963907, now seen corresponding path program 1 times [2020-08-21 15:04:44,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:44,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058432979] [2020-08-21 15:04:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:04:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:04:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 15:04:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:04:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 15:04:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:45,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058432979] [2020-08-21 15:04:45,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:45,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:45,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994607958] [2020-08-21 15:04:45,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:45,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:45,694 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 10 states. [2020-08-21 15:04:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:48,168 INFO L93 Difference]: Finished difference Result 552 states and 918 transitions. [2020-08-21 15:04:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 15:04:48,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 15:04:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:48,203 INFO L225 Difference]: With dead ends: 552 [2020-08-21 15:04:48,204 INFO L226 Difference]: Without dead ends: 416 [2020-08-21 15:04:48,210 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 [2020-08-21 15:04:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-21 15:04:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 234. [2020-08-21 15:04:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-21 15:04:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 306 transitions. [2020-08-21 15:04:48,325 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 306 transitions. Word has length 70 [2020-08-21 15:04:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:48,325 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 306 transitions. [2020-08-21 15:04:48,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 306 transitions. [2020-08-21 15:04:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 15:04:48,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:48,332 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] [2020-08-21 15:04:48,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:04:48,333 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:48,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1190139517, now seen corresponding path program 1 times [2020-08-21 15:04:48,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:48,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113775244] [2020-08-21 15:04:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:04:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:04:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 15:04:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:04:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 15:04:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:48,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113775244] [2020-08-21 15:04:48,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:48,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:48,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688996959] [2020-08-21 15:04:48,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:48,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:48,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:48,659 INFO L87 Difference]: Start difference. First operand 234 states and 306 transitions. Second operand 10 states. [2020-08-21 15:04:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:51,333 INFO L93 Difference]: Finished difference Result 805 states and 1159 transitions. [2020-08-21 15:04:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 15:04:51,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 15:04:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:51,355 INFO L225 Difference]: With dead ends: 805 [2020-08-21 15:04:51,355 INFO L226 Difference]: Without dead ends: 598 [2020-08-21 15:04:51,358 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 [2020-08-21 15:04:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-08-21 15:04:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 360. [2020-08-21 15:04:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 15:04:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2020-08-21 15:04:51,427 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 70 [2020-08-21 15:04:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:51,428 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2020-08-21 15:04:51,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2020-08-21 15:04:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 15:04:51,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:51,432 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] [2020-08-21 15:04:51,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:04:51,432 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:51,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1543227899, now seen corresponding path program 1 times [2020-08-21 15:04:51,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:51,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132371233] [2020-08-21 15:04:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:04:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:04:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 15:04:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:04:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 15:04:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:51,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132371233] [2020-08-21 15:04:51,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:51,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 15:04:51,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691311165] [2020-08-21 15:04:51,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:04:51,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:04:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:04:51,654 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand 11 states. [2020-08-21 15:04:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:53,346 INFO L93 Difference]: Finished difference Result 858 states and 1207 transitions. [2020-08-21 15:04:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 15:04:53,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-21 15:04:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:53,351 INFO L225 Difference]: With dead ends: 858 [2020-08-21 15:04:53,351 INFO L226 Difference]: Without dead ends: 541 [2020-08-21 15:04:53,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-08-21 15:04:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-21 15:04:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 365. [2020-08-21 15:04:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-08-21 15:04:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 479 transitions. [2020-08-21 15:04:53,399 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 479 transitions. Word has length 70 [2020-08-21 15:04:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:53,401 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 479 transitions. [2020-08-21 15:04:53,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:04:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 479 transitions. [2020-08-21 15:04:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 15:04:53,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:53,409 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] [2020-08-21 15:04:53,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:04:53,409 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 507756099, now seen corresponding path program 1 times [2020-08-21 15:04:53,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:53,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100536921] [2020-08-21 15:04:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:04:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:04:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 15:04:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:04:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 15:04:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:53,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100536921] [2020-08-21 15:04:53,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:53,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:53,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432025202] [2020-08-21 15:04:53,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:53,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:53,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:53,673 INFO L87 Difference]: Start difference. First operand 365 states and 479 transitions. Second operand 10 states. [2020-08-21 15:04:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:56,338 INFO L93 Difference]: Finished difference Result 1300 states and 1859 transitions. [2020-08-21 15:04:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 15:04:56,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 15:04:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:56,347 INFO L225 Difference]: With dead ends: 1300 [2020-08-21 15:04:56,347 INFO L226 Difference]: Without dead ends: 978 [2020-08-21 15:04:56,350 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 [2020-08-21 15:04:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-08-21 15:04:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 691. [2020-08-21 15:04:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-08-21 15:04:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 892 transitions. [2020-08-21 15:04:56,436 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 892 transitions. Word has length 70 [2020-08-21 15:04:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:56,437 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 892 transitions. [2020-08-21 15:04:56,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 892 transitions. [2020-08-21 15:04:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 15:04:56,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:56,439 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] [2020-08-21 15:04:56,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:04:56,439 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1263714876, now seen corresponding path program 1 times [2020-08-21 15:04:56,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:56,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148264534] [2020-08-21 15:04:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:04:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:04:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 15:04:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:04:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 15:04:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:56,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148264534] [2020-08-21 15:04:56,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:56,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 15:04:56,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105179179] [2020-08-21 15:04:56,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:04:56,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:56,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:04:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:04:56,656 INFO L87 Difference]: Start difference. First operand 691 states and 892 transitions. Second operand 11 states. [2020-08-21 15:04:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:58,528 INFO L93 Difference]: Finished difference Result 1616 states and 2202 transitions. [2020-08-21 15:04:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 15:04:58,528 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-21 15:04:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:58,536 INFO L225 Difference]: With dead ends: 1616 [2020-08-21 15:04:58,537 INFO L226 Difference]: Without dead ends: 968 [2020-08-21 15:04:58,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 15:04:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-21 15:04:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 706. [2020-08-21 15:04:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-08-21 15:04:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 904 transitions. [2020-08-21 15:04:58,607 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 904 transitions. Word has length 70 [2020-08-21 15:04:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:58,608 INFO L479 AbstractCegarLoop]: Abstraction has 706 states and 904 transitions. [2020-08-21 15:04:58,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:04:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 904 transitions. [2020-08-21 15:04:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 15:04:58,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:58,610 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] [2020-08-21 15:04:58,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:04:58,610 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1123166266, now seen corresponding path program 1 times [2020-08-21 15:04:58,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:58,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872099577] [2020-08-21 15:04:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:04:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 15:04:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 15:04:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:04:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 15:04:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:58,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872099577] [2020-08-21 15:04:58,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:58,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:58,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717560253] [2020-08-21 15:04:58,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:58,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:58,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:58,803 INFO L87 Difference]: Start difference. First operand 706 states and 904 transitions. Second operand 10 states. [2020-08-21 15:05:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:01,223 INFO L93 Difference]: Finished difference Result 1675 states and 2255 transitions. [2020-08-21 15:05:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 15:05:01,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 15:05:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:01,232 INFO L225 Difference]: With dead ends: 1675 [2020-08-21 15:05:01,232 INFO L226 Difference]: Without dead ends: 1111 [2020-08-21 15:05:01,236 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 [2020-08-21 15:05:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-21 15:05:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 722. [2020-08-21 15:05:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-08-21 15:05:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 913 transitions. [2020-08-21 15:05:01,346 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 913 transitions. Word has length 70 [2020-08-21 15:05:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:01,347 INFO L479 AbstractCegarLoop]: Abstraction has 722 states and 913 transitions. [2020-08-21 15:05:01,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:05:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 913 transitions. [2020-08-21 15:05:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 15:05:01,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:01,348 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] [2020-08-21 15:05:01,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:05:01,349 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1940814716, now seen corresponding path program 1 times [2020-08-21 15:05:01,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:01,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377447206] [2020-08-21 15:05:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:05:01,367 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:05:01,368 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:05:01,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:05:01,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:05:01 BoogieIcfgContainer [2020-08-21 15:05:01,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:05:01,410 INFO L168 Benchmark]: Toolchain (without parser) took 17678.14 ms. Allocated memory was 149.4 MB in the beginning and 433.6 MB in the end (delta: 284.2 MB). Free memory was 105.5 MB in the beginning and 366.3 MB in the end (delta: -260.7 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:01,410 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 149.4 MB. Free memory was 124.0 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:05:01,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.61 ms. Allocated memory was 149.4 MB in the beginning and 206.6 MB in the end (delta: 57.1 MB). Free memory was 105.3 MB in the beginning and 185.3 MB in the end (delta: -79.9 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:01,418 INFO L168 Benchmark]: Boogie Preprocessor took 80.29 ms. Allocated memory is still 206.6 MB. Free memory was 185.3 MB in the beginning and 182.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:01,418 INFO L168 Benchmark]: RCFGBuilder took 571.23 ms. Allocated memory is still 206.6 MB. Free memory was 182.9 MB in the beginning and 151.0 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:01,419 INFO L168 Benchmark]: TraceAbstraction took 16578.19 ms. Allocated memory was 206.6 MB in the beginning and 433.6 MB in the end (delta: 227.0 MB). Free memory was 150.3 MB in the beginning and 366.3 MB in the end (delta: -215.9 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:01,431 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 149.4 MB. Free memory was 124.0 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 442.61 ms. Allocated memory was 149.4 MB in the beginning and 206.6 MB in the end (delta: 57.1 MB). Free memory was 105.3 MB in the beginning and 185.3 MB in the end (delta: -79.9 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.29 ms. Allocated memory is still 206.6 MB. Free memory was 185.3 MB in the beginning and 182.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 571.23 ms. Allocated memory is still 206.6 MB. Free memory was 182.9 MB in the beginning and 151.0 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16578.19 ms. Allocated memory was 206.6 MB in the beginning and 433.6 MB in the end (delta: 227.0 MB). Free memory was 150.3 MB in the beginning and 366.3 MB in the end (delta: -215.9 MB). Peak memory consumption was 11.1 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: 16.4s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 13.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 986 SDtfs, 3575 SDslu, 1133 SDs, 0 SdLazy, 8329 SolverSat, 2226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3.1s 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, 1.5s 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...