/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 false -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 0.1.25-89f541c [2020-08-27 22:00:41,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 22:00:41,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 22:00:41,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 22:00:41,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 22:00:41,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 22:00:41,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 22:00:41,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 22:00:41,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 22:00:41,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 22:00:41,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 22:00:41,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 22:00:41,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 22:00:41,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 22:00:41,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 22:00:41,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 22:00:41,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 22:00:41,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 22:00:41,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 22:00:41,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 22:00:41,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 22:00:41,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 22:00:41,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 22:00:41,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 22:00:41,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 22:00:41,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 22:00:41,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 22:00:41,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 22:00:41,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 22:00:41,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 22:00:41,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 22:00:41,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 22:00:41,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 22:00:41,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 22:00:41,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 22:00:41,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 22:00:41,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 22:00:41,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 22:00:41,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 22:00:41,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 22:00:41,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 22:00:41,650 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 [2020-08-27 22:00:41,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 22:00:41,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 22:00:41,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 22:00:41,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 22:00:41,697 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 22:00:41,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 22:00:41,698 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 22:00:41,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 22:00:41,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 22:00:41,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 22:00:41,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 22:00:41,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 22:00:41,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 22:00:41,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 22:00:41,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 22:00:41,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 22:00:41,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 22:00:41,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 22:00:41,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 22:00:41,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 22:00:41,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 22:00:41,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 22:00:41,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 22:00:41,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 22:00:41,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 22:00:41,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 22:00:41,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 22:00:41,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 22:00:41,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 22:00:41,703 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 -> false [2020-08-27 22:00:42,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 22:00:42,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 22:00:42,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 22:00:42,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 22:00:42,177 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 22:00:42,179 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-27 22:00:42,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f373c8ae/8e3c46e451944172869d52f8ec73501e/FLAGf2e8af0c1 [2020-08-27 22:00:42,842 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 22:00:42,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-27 22:00:42,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f373c8ae/8e3c46e451944172869d52f8ec73501e/FLAGf2e8af0c1 [2020-08-27 22:00:43,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f373c8ae/8e3c46e451944172869d52f8ec73501e [2020-08-27 22:00:43,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 22:00:43,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 22:00:43,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 22:00:43,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 22:00:43,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 22:00:43,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e979d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43, skipping insertion in model container [2020-08-27 22:00:43,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 22:00:43,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 22:00:43,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 22:00:43,446 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 22:00:43,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 22:00:43,594 INFO L208 MainTranslator]: Completed translation [2020-08-27 22:00:43,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43 WrapperNode [2020-08-27 22:00:43,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 22:00:43,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 22:00:43,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 22:00:43,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 22:00:43,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (1/1) ... [2020-08-27 22:00:43,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 22:00:43,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 22:00:43,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 22:00:43,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 22:00:43,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (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 [2020-08-27 22:00:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 22:00:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 22:00:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-27 22:00:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2020-08-27 22:00:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-27 22:00:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-27 22:00:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-27 22:00:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-27 22:00:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-27 22:00:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-27 22:00:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-27 22:00:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-27 22:00:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-27 22:00:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-27 22:00:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-27 22:00:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-27 22:00:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-27 22:00:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-27 22:00:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-27 22:00:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 22:00:43,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 22:00:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 22:00:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-27 22:00:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2020-08-27 22:00:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-27 22:00:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-27 22:00:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-27 22:00:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-27 22:00:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-27 22:00:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-27 22:00:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-27 22:00:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-27 22:00:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-27 22:00:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-27 22:00:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-27 22:00:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-27 22:00:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-27 22:00:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-27 22:00:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-27 22:00:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 22:00:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 22:00:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 22:00:44,246 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 22:00:44,246 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-27 22:00:44,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:00:44 BoogieIcfgContainer [2020-08-27 22:00:44,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 22:00:44,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 22:00:44,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 22:00:44,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 22:00:44,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 10:00:43" (1/3) ... [2020-08-27 22:00:44,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f00a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 10:00:44, skipping insertion in model container [2020-08-27 22:00:44,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:00:43" (2/3) ... [2020-08-27 22:00:44,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f00a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 10:00:44, skipping insertion in model container [2020-08-27 22:00:44,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:00:44" (3/3) ... [2020-08-27 22:00:44,262 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-08-27 22:00:44,274 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 22:00:44,285 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 22:00:44,308 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 22:00:44,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 22:00:44,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 22:00:44,342 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 22:00:44,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 22:00:44,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 22:00:44,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 22:00:44,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 22:00:44,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 22:00:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-08-27 22:00:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-27 22:00:44,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:44,385 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] [2020-08-27 22:00:44,385 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 742963907, now seen corresponding path program 1 times [2020-08-27 22:00:44,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:44,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337972119] [2020-08-27 22:00:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:44,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:44,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 22:00:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:44,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 22:00:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:44,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 22:00:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:45,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 22:00:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:45,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-27 22:00:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:45,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 22:00:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:45,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 22:00:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:45,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-27 22:00:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:45,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-27 22:00:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:45,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337972119] [2020-08-27 22:00:45,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 22:00:45,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 22:00:45,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444254742] [2020-08-27 22:00:45,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 22:00:45,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:45,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 22:00:45,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-27 22:00:45,158 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 10 states. [2020-08-27 22:00:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:48,034 INFO L93 Difference]: Finished difference Result 552 states and 918 transitions. [2020-08-27 22:00:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-27 22:00:48,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-27 22:00:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:48,059 INFO L225 Difference]: With dead ends: 552 [2020-08-27 22:00:48,059 INFO L226 Difference]: Without dead ends: 416 [2020-08-27 22:00:48,069 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 [2020-08-27 22:00:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-27 22:00:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 234. [2020-08-27 22:00:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-27 22:00:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 306 transitions. [2020-08-27 22:00:48,203 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 306 transitions. Word has length 70 [2020-08-27 22:00:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:48,204 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 306 transitions. [2020-08-27 22:00:48,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 22:00:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 306 transitions. [2020-08-27 22:00:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-27 22:00:48,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:48,209 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] [2020-08-27 22:00:48,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 22:00:48,210 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1190139517, now seen corresponding path program 1 times [2020-08-27 22:00:48,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:48,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71247229] [2020-08-27 22:00:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 22:00:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 22:00:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 22:00:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 22:00:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-27 22:00:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 22:00:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 22:00:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-27 22:00:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-27 22:00:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:48,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71247229] [2020-08-27 22:00:48,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 22:00:48,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 22:00:48,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547314417] [2020-08-27 22:00:48,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 22:00:48,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:48,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 22:00:48,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-27 22:00:48,492 INFO L87 Difference]: Start difference. First operand 234 states and 306 transitions. Second operand 10 states. [2020-08-27 22:00:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:51,571 INFO L93 Difference]: Finished difference Result 805 states and 1159 transitions. [2020-08-27 22:00:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-27 22:00:51,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-27 22:00:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:51,578 INFO L225 Difference]: With dead ends: 805 [2020-08-27 22:00:51,578 INFO L226 Difference]: Without dead ends: 598 [2020-08-27 22:00:51,581 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 [2020-08-27 22:00:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-08-27 22:00:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 360. [2020-08-27 22:00:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-27 22:00:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2020-08-27 22:00:51,647 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 70 [2020-08-27 22:00:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:51,647 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2020-08-27 22:00:51,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 22:00:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2020-08-27 22:00:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-27 22:00:51,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:51,651 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] [2020-08-27 22:00:51,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 22:00:51,651 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1543227899, now seen corresponding path program 1 times [2020-08-27 22:00:51,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:51,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724119146] [2020-08-27 22:00:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 22:00:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 22:00:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 22:00:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 22:00:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-27 22:00:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 22:00:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 22:00:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-27 22:00:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-27 22:00:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:51,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724119146] [2020-08-27 22:00:51,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 22:00:51,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-27 22:00:51,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913554610] [2020-08-27 22:00:51,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 22:00:51,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 22:00:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-27 22:00:51,951 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand 11 states. [2020-08-27 22:00:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:53,823 INFO L93 Difference]: Finished difference Result 858 states and 1207 transitions. [2020-08-27 22:00:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-27 22:00:53,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-27 22:00:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:53,829 INFO L225 Difference]: With dead ends: 858 [2020-08-27 22:00:53,829 INFO L226 Difference]: Without dead ends: 541 [2020-08-27 22:00:53,831 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 [2020-08-27 22:00:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-27 22:00:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 365. [2020-08-27 22:00:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-08-27 22:00:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 479 transitions. [2020-08-27 22:00:53,888 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 479 transitions. Word has length 70 [2020-08-27 22:00:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:53,890 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 479 transitions. [2020-08-27 22:00:53,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 22:00:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 479 transitions. [2020-08-27 22:00:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-27 22:00:53,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:53,897 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] [2020-08-27 22:00:53,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 22:00:53,897 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:53,899 INFO L82 PathProgramCache]: Analyzing trace with hash 507756099, now seen corresponding path program 1 times [2020-08-27 22:00:53,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:53,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887180548] [2020-08-27 22:00:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 22:00:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 22:00:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 22:00:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 22:00:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-27 22:00:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 22:00:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 22:00:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-27 22:00:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-27 22:00:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:54,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887180548] [2020-08-27 22:00:54,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 22:00:54,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 22:00:54,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137813795] [2020-08-27 22:00:54,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 22:00:54,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 22:00:54,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-27 22:00:54,207 INFO L87 Difference]: Start difference. First operand 365 states and 479 transitions. Second operand 10 states. [2020-08-27 22:00:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:57,151 INFO L93 Difference]: Finished difference Result 1300 states and 1859 transitions. [2020-08-27 22:00:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-27 22:00:57,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-27 22:00:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:57,158 INFO L225 Difference]: With dead ends: 1300 [2020-08-27 22:00:57,158 INFO L226 Difference]: Without dead ends: 978 [2020-08-27 22:00:57,161 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 [2020-08-27 22:00:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-08-27 22:00:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 691. [2020-08-27 22:00:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-08-27 22:00:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 892 transitions. [2020-08-27 22:00:57,232 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 892 transitions. Word has length 70 [2020-08-27 22:00:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:57,233 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 892 transitions. [2020-08-27 22:00:57,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 22:00:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 892 transitions. [2020-08-27 22:00:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-27 22:00:57,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:57,235 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] [2020-08-27 22:00:57,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 22:00:57,235 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1263714876, now seen corresponding path program 1 times [2020-08-27 22:00:57,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:57,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978920818] [2020-08-27 22:00:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 22:00:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 22:00:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 22:00:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 22:00:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-27 22:00:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 22:00:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 22:00:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-27 22:00:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-27 22:00:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:57,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978920818] [2020-08-27 22:00:57,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 22:00:57,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-27 22:00:57,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511119758] [2020-08-27 22:00:57,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 22:00:57,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 22:00:57,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-27 22:00:57,569 INFO L87 Difference]: Start difference. First operand 691 states and 892 transitions. Second operand 11 states. [2020-08-27 22:00:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:59,607 INFO L93 Difference]: Finished difference Result 1616 states and 2202 transitions. [2020-08-27 22:00:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-27 22:00:59,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-27 22:00:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:59,617 INFO L225 Difference]: With dead ends: 1616 [2020-08-27 22:00:59,617 INFO L226 Difference]: Without dead ends: 968 [2020-08-27 22:00:59,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-27 22:00:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-27 22:00:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 706. [2020-08-27 22:00:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-08-27 22:00:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 904 transitions. [2020-08-27 22:00:59,731 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 904 transitions. Word has length 70 [2020-08-27 22:00:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:59,731 INFO L479 AbstractCegarLoop]: Abstraction has 706 states and 904 transitions. [2020-08-27 22:00:59,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 22:00:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 904 transitions. [2020-08-27 22:00:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-27 22:00:59,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:59,734 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] [2020-08-27 22:00:59,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 22:00:59,734 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1123166266, now seen corresponding path program 1 times [2020-08-27 22:00:59,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:59,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456575329] [2020-08-27 22:00:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 22:00:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 22:00:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 22:00:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 22:00:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-27 22:00:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 22:00:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 22:00:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-27 22:00:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-27 22:00:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:59,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456575329] [2020-08-27 22:00:59,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 22:00:59,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 22:00:59,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530260202] [2020-08-27 22:00:59,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 22:00:59,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 22:00:59,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-27 22:00:59,994 INFO L87 Difference]: Start difference. First operand 706 states and 904 transitions. Second operand 10 states. [2020-08-27 22:01:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:01:03,000 INFO L93 Difference]: Finished difference Result 1675 states and 2255 transitions. [2020-08-27 22:01:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-27 22:01:03,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-27 22:01:03,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:01:03,008 INFO L225 Difference]: With dead ends: 1675 [2020-08-27 22:01:03,009 INFO L226 Difference]: Without dead ends: 1111 [2020-08-27 22:01:03,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-08-27 22:01:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-27 22:01:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 722. [2020-08-27 22:01:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-08-27 22:01:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 913 transitions. [2020-08-27 22:01:03,112 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 913 transitions. Word has length 70 [2020-08-27 22:01:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:01:03,112 INFO L479 AbstractCegarLoop]: Abstraction has 722 states and 913 transitions. [2020-08-27 22:01:03,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 22:01:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 913 transitions. [2020-08-27 22:01:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-27 22:01:03,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:01:03,116 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] [2020-08-27 22:01:03,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 22:01:03,117 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:01:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:01:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1940814716, now seen corresponding path program 1 times [2020-08-27 22:01:03,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:01:03,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657745924] [2020-08-27 22:01:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:01:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 22:01:03,155 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 22:01:03,156 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 22:01:03,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 22:01:03,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 10:01:03 BoogieIcfgContainer [2020-08-27 22:01:03,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 22:01:03,204 INFO L168 Benchmark]: Toolchain (without parser) took 20063.03 ms. Allocated memory was 140.0 MB in the beginning and 428.9 MB in the end (delta: 288.9 MB). Free memory was 103.0 MB in the beginning and 378.9 MB in the end (delta: -275.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-27 22:01:03,205 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 22:01:03,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.10 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.8 MB in the beginning and 181.7 MB in the end (delta: -78.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-08-27 22:01:03,214 INFO L168 Benchmark]: Boogie Preprocessor took 59.33 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-27 22:01:03,214 INFO L168 Benchmark]: RCFGBuilder took 597.45 ms. Allocated memory is still 202.9 MB. Free memory was 179.3 MB in the beginning and 147.4 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. [2020-08-27 22:01:03,215 INFO L168 Benchmark]: TraceAbstraction took 18946.08 ms. Allocated memory was 202.9 MB in the beginning and 428.9 MB in the end (delta: 226.0 MB). Free memory was 146.7 MB in the beginning and 378.9 MB in the end (delta: -232.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 22:01:03,226 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 455.10 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.8 MB in the beginning and 181.7 MB in the end (delta: -78.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.33 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 597.45 ms. Allocated memory is still 202.9 MB. Free memory was 179.3 MB in the beginning and 147.4 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18946.08 ms. Allocated memory was 202.9 MB in the beginning and 428.9 MB in the end (delta: 226.0 MB). Free memory was 146.7 MB in the beginning and 378.9 MB in the end (delta: -232.2 MB). There was no memory consumed. 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: 18.8s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 986 SDtfs, 3575 SDslu, 1132 SDs, 0 SdLazy, 8326 SolverSat, 2229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3.4s 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: 0.5s AutomataMinimizationTime, 6 MinimizatonAttempts, 1534 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s 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...