/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:25:52,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:25:52,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:25:52,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:25:52,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:25:52,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:25:52,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:25:52,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:25:52,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:25:52,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:25:52,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:25:52,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:25:52,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:25:52,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:25:52,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:25:52,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:25:52,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:25:52,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:25:52,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:25:52,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:25:52,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:25:52,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:25:52,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:25:52,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:25:52,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:25:52,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:25:52,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:25:52,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:25:52,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:25:52,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:25:52,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:25:52,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:25:52,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:25:52,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:25:52,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:25:52,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:25:52,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:25:52,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:25:52,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:25:52,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:25:52,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:25:52,288 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 [2020-08-18 16:25:52,312 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:25:52,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:25:52,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:25:52,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:25:52,319 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:25:52,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:25:52,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:25:52,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:25:52,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:25:52,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:25:52,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:25:52,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:25:52,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:25:52,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:25:52,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:25:52,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:25:52,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:25:52,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:25:52,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:25:52,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:25:52,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:25:52,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:25:52,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:25:52,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:25:52,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:25:52,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:25:52,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:25:52,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:25:52,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:25:52,325 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 [2020-08-18 16:25:52,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:25:52,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:25:52,673 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:25:52,674 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:25:52,675 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:25:52,675 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-18 16:25:52,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8006c5d6b/adbe90cdf6a644698aca4706e895bc5d/FLAG2cf1141ca [2020-08-18 16:25:53,147 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:25:53,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-18 16:25:53,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8006c5d6b/adbe90cdf6a644698aca4706e895bc5d/FLAG2cf1141ca [2020-08-18 16:25:53,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8006c5d6b/adbe90cdf6a644698aca4706e895bc5d [2020-08-18 16:25:53,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:25:53,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:25:53,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:25:53,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:25:53,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:25:53,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:25:53" (1/1) ... [2020-08-18 16:25:53,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@129c6bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:53, skipping insertion in model container [2020-08-18 16:25:53,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:25:53" (1/1) ... [2020-08-18 16:25:53,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:25:53,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:25:53,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:25:53,851 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:25:53,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:25:54,003 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:25:54,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54 WrapperNode [2020-08-18 16:25:54,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:25:54,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:25:54,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:25:54,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:25:54,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (1/1) ... [2020-08-18 16:25:54,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (1/1) ... [2020-08-18 16:25:54,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (1/1) ... [2020-08-18 16:25:54,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (1/1) ... [2020-08-18 16:25:54,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (1/1) ... [2020-08-18 16:25:54,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (1/1) ... [2020-08-18 16:25:54,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (1/1) ... [2020-08-18 16:25:54,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:25:54,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:25:54,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:25:54,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:25:54,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (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 [2020-08-18 16:25:54,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:25:54,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:25:54,118 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 16:25:54,118 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2020-08-18 16:25:54,118 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 16:25:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 16:25:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 16:25:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 16:25:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 16:25:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-18 16:25:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 16:25:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 16:25:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-18 16:25:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-18 16:25:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-18 16:25:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 16:25:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 16:25:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 16:25:54,121 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 16:25:54,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:25:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:25:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:25:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 16:25:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2020-08-18 16:25:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 16:25:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 16:25:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 16:25:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 16:25:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 16:25:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-18 16:25:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 16:25:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 16:25:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-18 16:25:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-18 16:25:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-18 16:25:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 16:25:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 16:25:54,124 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 16:25:54,124 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 16:25:54,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:25:54,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:25:54,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:25:54,627 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:25:54,627 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 16:25:54,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:25:54 BoogieIcfgContainer [2020-08-18 16:25:54,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:25:54,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:25:54,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:25:54,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:25:54,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:25:53" (1/3) ... [2020-08-18 16:25:54,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13803b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:25:54, skipping insertion in model container [2020-08-18 16:25:54,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:25:54" (2/3) ... [2020-08-18 16:25:54,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13803b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:25:54, skipping insertion in model container [2020-08-18 16:25:54,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:25:54" (3/3) ... [2020-08-18 16:25:54,641 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-08-18 16:25:54,651 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:25:54,658 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:25:54,670 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:25:54,693 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:25:54,694 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:25:54,694 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:25:54,694 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:25:54,694 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:25:54,695 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:25:54,695 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:25:54,695 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:25:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-08-18 16:25:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 16:25:54,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:25:54,728 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] [2020-08-18 16:25:54,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:25:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:25:54,734 INFO L82 PathProgramCache]: Analyzing trace with hash 742963907, now seen corresponding path program 1 times [2020-08-18 16:25:54,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:25:54,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579424268] [2020-08-18 16:25:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:25:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:25:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:25:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:25:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:25:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 16:25:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 16:25:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:25:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:25:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 16:25:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 16:25:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:25:55,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579424268] [2020-08-18 16:25:55,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:25:55,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 16:25:55,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102821083] [2020-08-18 16:25:55,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:25:55,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:25:55,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:25:55,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:25:55,383 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 10 states. [2020-08-18 16:25:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:25:57,957 INFO L93 Difference]: Finished difference Result 552 states and 918 transitions. [2020-08-18 16:25:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 16:25:57,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 16:25:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:25:57,979 INFO L225 Difference]: With dead ends: 552 [2020-08-18 16:25:57,980 INFO L226 Difference]: Without dead ends: 416 [2020-08-18 16:25:57,987 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 [2020-08-18 16:25:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-18 16:25:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 234. [2020-08-18 16:25:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-18 16:25:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 306 transitions. [2020-08-18 16:25:58,108 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 306 transitions. Word has length 70 [2020-08-18 16:25:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:25:58,109 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 306 transitions. [2020-08-18 16:25:58,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:25:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 306 transitions. [2020-08-18 16:25:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 16:25:58,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:25:58,114 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] [2020-08-18 16:25:58,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:25:58,115 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:25:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:25:58,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1190139517, now seen corresponding path program 1 times [2020-08-18 16:25:58,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:25:58,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792564789] [2020-08-18 16:25:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:25:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:25:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:25:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:25:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:25:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 16:25:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 16:25:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:25:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:25:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 16:25:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 16:25:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:25:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:25:58,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792564789] [2020-08-18 16:25:58,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:25:58,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 16:25:58,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299212846] [2020-08-18 16:25:58,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:25:58,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:25:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:25:58,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:25:58,458 INFO L87 Difference]: Start difference. First operand 234 states and 306 transitions. Second operand 10 states. [2020-08-18 16:26:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:26:01,323 INFO L93 Difference]: Finished difference Result 805 states and 1159 transitions. [2020-08-18 16:26:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 16:26:01,325 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 16:26:01,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:26:01,341 INFO L225 Difference]: With dead ends: 805 [2020-08-18 16:26:01,341 INFO L226 Difference]: Without dead ends: 598 [2020-08-18 16:26:01,349 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 [2020-08-18 16:26:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-08-18 16:26:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 360. [2020-08-18 16:26:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 16:26:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2020-08-18 16:26:01,429 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 70 [2020-08-18 16:26:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:26:01,430 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2020-08-18 16:26:01,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:26:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2020-08-18 16:26:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 16:26:01,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:26:01,434 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] [2020-08-18 16:26:01,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:26:01,434 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:26:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:26:01,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1543227899, now seen corresponding path program 1 times [2020-08-18 16:26:01,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:26:01,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392130253] [2020-08-18 16:26:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:26:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:26:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:26:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:26:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:26:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 16:26:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 16:26:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:26:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:26:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 16:26:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 16:26:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:26:01,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392130253] [2020-08-18 16:26:01,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:26:01,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 16:26:01,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350218651] [2020-08-18 16:26:01,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:26:01,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:26:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:26:01,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:26:01,710 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand 11 states. [2020-08-18 16:26:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:26:03,424 INFO L93 Difference]: Finished difference Result 858 states and 1207 transitions. [2020-08-18 16:26:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 16:26:03,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-18 16:26:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:26:03,431 INFO L225 Difference]: With dead ends: 858 [2020-08-18 16:26:03,431 INFO L226 Difference]: Without dead ends: 541 [2020-08-18 16:26:03,434 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 [2020-08-18 16:26:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-18 16:26:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 365. [2020-08-18 16:26:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-08-18 16:26:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 479 transitions. [2020-08-18 16:26:03,506 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 479 transitions. Word has length 70 [2020-08-18 16:26:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:26:03,508 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 479 transitions. [2020-08-18 16:26:03,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:26:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 479 transitions. [2020-08-18 16:26:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 16:26:03,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:26:03,514 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] [2020-08-18 16:26:03,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:26:03,514 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:26:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:26:03,515 INFO L82 PathProgramCache]: Analyzing trace with hash 507756099, now seen corresponding path program 1 times [2020-08-18 16:26:03,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:26:03,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951852178] [2020-08-18 16:26:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:26:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:26:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:26:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:26:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:26:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 16:26:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 16:26:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:26:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:26:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 16:26:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 16:26:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:26:03,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951852178] [2020-08-18 16:26:03,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:26:03,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 16:26:03,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375124156] [2020-08-18 16:26:03,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:26:03,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:26:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:26:03,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:26:03,724 INFO L87 Difference]: Start difference. First operand 365 states and 479 transitions. Second operand 10 states. [2020-08-18 16:26:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:26:06,375 INFO L93 Difference]: Finished difference Result 1300 states and 1859 transitions. [2020-08-18 16:26:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 16:26:06,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 16:26:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:26:06,385 INFO L225 Difference]: With dead ends: 1300 [2020-08-18 16:26:06,385 INFO L226 Difference]: Without dead ends: 978 [2020-08-18 16:26:06,388 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 [2020-08-18 16:26:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-08-18 16:26:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 691. [2020-08-18 16:26:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-08-18 16:26:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 892 transitions. [2020-08-18 16:26:06,469 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 892 transitions. Word has length 70 [2020-08-18 16:26:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:26:06,470 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 892 transitions. [2020-08-18 16:26:06,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:26:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 892 transitions. [2020-08-18 16:26:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 16:26:06,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:26:06,473 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] [2020-08-18 16:26:06,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:26:06,473 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:26:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:26:06,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1263714876, now seen corresponding path program 1 times [2020-08-18 16:26:06,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:26:06,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610725566] [2020-08-18 16:26:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:26:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:26:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:26:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:26:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:26:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 16:26:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 16:26:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:26:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:26:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 16:26:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 16:26:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:26:06,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610725566] [2020-08-18 16:26:06,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:26:06,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 16:26:06,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40815649] [2020-08-18 16:26:06,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:26:06,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:26:06,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:26:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:26:06,727 INFO L87 Difference]: Start difference. First operand 691 states and 892 transitions. Second operand 11 states. [2020-08-18 16:26:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:26:08,680 INFO L93 Difference]: Finished difference Result 1616 states and 2202 transitions. [2020-08-18 16:26:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 16:26:08,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-18 16:26:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:26:08,688 INFO L225 Difference]: With dead ends: 1616 [2020-08-18 16:26:08,688 INFO L226 Difference]: Without dead ends: 968 [2020-08-18 16:26:08,691 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 [2020-08-18 16:26:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-18 16:26:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 706. [2020-08-18 16:26:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-08-18 16:26:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 904 transitions. [2020-08-18 16:26:08,768 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 904 transitions. Word has length 70 [2020-08-18 16:26:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:26:08,768 INFO L479 AbstractCegarLoop]: Abstraction has 706 states and 904 transitions. [2020-08-18 16:26:08,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:26:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 904 transitions. [2020-08-18 16:26:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 16:26:08,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:26:08,770 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] [2020-08-18 16:26:08,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:26:08,771 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:26:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:26:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1123166266, now seen corresponding path program 1 times [2020-08-18 16:26:08,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:26:08,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506922062] [2020-08-18 16:26:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:26:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:26:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:26:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:26:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:26:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 16:26:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 16:26:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:26:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:26:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:08,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 16:26:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:09,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 16:26:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:26:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:26:09,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506922062] [2020-08-18 16:26:09,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:26:09,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 16:26:09,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454963764] [2020-08-18 16:26:09,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:26:09,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:26:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:26:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:26:09,034 INFO L87 Difference]: Start difference. First operand 706 states and 904 transitions. Second operand 10 states. [2020-08-18 16:26:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:26:11,489 INFO L93 Difference]: Finished difference Result 1675 states and 2255 transitions. [2020-08-18 16:26:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 16:26:11,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 16:26:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:26:11,500 INFO L225 Difference]: With dead ends: 1675 [2020-08-18 16:26:11,500 INFO L226 Difference]: Without dead ends: 1111 [2020-08-18 16:26:11,503 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 [2020-08-18 16:26:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-18 16:26:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 722. [2020-08-18 16:26:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-08-18 16:26:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 913 transitions. [2020-08-18 16:26:11,594 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 913 transitions. Word has length 70 [2020-08-18 16:26:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:26:11,594 INFO L479 AbstractCegarLoop]: Abstraction has 722 states and 913 transitions. [2020-08-18 16:26:11,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:26:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 913 transitions. [2020-08-18 16:26:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 16:26:11,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:26:11,600 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] [2020-08-18 16:26:11,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:26:11,600 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:26:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:26:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1940814716, now seen corresponding path program 1 times [2020-08-18 16:26:11,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:26:11,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038826392] [2020-08-18 16:26:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:26:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:26:11,625 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:26:11,626 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:26:11,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:26:11,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:26:11 BoogieIcfgContainer [2020-08-18 16:26:11,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:26:11,668 INFO L168 Benchmark]: Toolchain (without parser) took 18141.21 ms. Allocated memory was 146.8 MB in the beginning and 454.0 MB in the end (delta: 307.2 MB). Free memory was 102.8 MB in the beginning and 199.1 MB in the end (delta: -96.3 MB). Peak memory consumption was 210.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:26:11,669 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 16:26:11,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 477.31 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 102.6 MB in the beginning and 178.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:26:11,676 INFO L168 Benchmark]: Boogie Preprocessor took 44.66 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:26:11,677 INFO L168 Benchmark]: RCFGBuilder took 583.62 ms. Allocated memory is still 202.4 MB. Free memory was 176.9 MB in the beginning and 145.1 MB in the end (delta: 31.8 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:26:11,678 INFO L168 Benchmark]: TraceAbstraction took 17030.61 ms. Allocated memory was 202.4 MB in the beginning and 454.0 MB in the end (delta: 251.7 MB). Free memory was 144.4 MB in the beginning and 199.1 MB in the end (delta: -54.7 MB). Peak memory consumption was 197.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:26:11,690 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 477.31 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 102.6 MB in the beginning and 178.9 MB in the end (delta: -76.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.66 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 583.62 ms. Allocated memory is still 202.4 MB. Free memory was 176.9 MB in the beginning and 145.1 MB in the end (delta: 31.8 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17030.61 ms. Allocated memory was 202.4 MB in the beginning and 454.0 MB in the end (delta: 251.7 MB). Free memory was 144.4 MB in the beginning and 199.1 MB in the end (delta: -54.7 MB). Peak memory consumption was 197.0 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: 16.9s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 986 SDtfs, 3575 SDslu, 1133 SDs, 0 SdLazy, 8344 SolverSat, 2220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.1s 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: 0.5s 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...