/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 11:29:31,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:29:31,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:29:31,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:29:31,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:29:31,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:29:31,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:29:31,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:29:31,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:29:31,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:29:31,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:29:31,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:29:31,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:29:31,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:29:31,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:29:31,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:29:31,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:29:31,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:29:31,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:29:31,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:29:31,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:29:31,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:29:31,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:29:31,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:29:31,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:29:31,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:29:31,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:29:31,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:29:31,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:29:31,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:29:31,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:29:31,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:29:31,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:29:31,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:29:31,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:29:31,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:29:31,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:29:31,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:29:31,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:29:31,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:29:31,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:29:31,238 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 11:29:31,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:29:31,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:29:31,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:29:31,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:29:31,293 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:29:31,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:29:31,293 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:29:31,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:29:31,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:29:31,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:29:31,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:29:31,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:29:31,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:29:31,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:29:31,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:29:31,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:29:31,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:29:31,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:29:31,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:29:31,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:29:31,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:29:31,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:29:31,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:29:31,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:29:31,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:29:31,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:29:31,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:29:31,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:29:31,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:29:31,304 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 11:29:31,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:29:31,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:29:31,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:29:31,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:29:31,658 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:29:31,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-18 11:29:31,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02335a259/e5d6073066f44c9ca2c3be71f346a303/FLAGd115ac9aa [2020-08-18 11:29:32,262 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:29:32,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-18 11:29:32,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02335a259/e5d6073066f44c9ca2c3be71f346a303/FLAGd115ac9aa [2020-08-18 11:29:32,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02335a259/e5d6073066f44c9ca2c3be71f346a303 [2020-08-18 11:29:32,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:29:32,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:29:32,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:29:32,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:29:32,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:29:32,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bae0244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:32, skipping insertion in model container [2020-08-18 11:29:32,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:32" (1/1) ... [2020-08-18 11:29:32,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:29:32,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:29:33,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:29:33,057 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:29:33,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:29:33,221 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:29:33,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33 WrapperNode [2020-08-18 11:29:33,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:29:33,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:29:33,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:29:33,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:29:33,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (1/1) ... [2020-08-18 11:29:33,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (1/1) ... [2020-08-18 11:29:33,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (1/1) ... [2020-08-18 11:29:33,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (1/1) ... [2020-08-18 11:29:33,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (1/1) ... [2020-08-18 11:29:33,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (1/1) ... [2020-08-18 11:29:33,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (1/1) ... [2020-08-18 11:29:33,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:29:33,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:29:33,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:29:33,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:29:33,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (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 11:29:33,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:29:33,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:29:33,336 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 11:29:33,336 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2020-08-18 11:29:33,337 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 11:29:33,337 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 11:29:33,337 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 11:29:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 11:29:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 11:29:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-18 11:29:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 11:29:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 11:29:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-18 11:29:33,339 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-18 11:29:33,339 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-18 11:29:33,339 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 11:29:33,339 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 11:29:33,339 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 11:29:33,339 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 11:29:33,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:29:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:29:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:29:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 11:29:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2020-08-18 11:29:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 11:29:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 11:29:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 11:29:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 11:29:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 11:29:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-18 11:29:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 11:29:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 11:29:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-18 11:29:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-18 11:29:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-18 11:29:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 11:29:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 11:29:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 11:29:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 11:29:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:29:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:29:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:29:33,855 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:29:33,856 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 11:29:33,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:33 BoogieIcfgContainer [2020-08-18 11:29:33,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:29:33,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:29:33,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:29:33,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:29:33,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:29:32" (1/3) ... [2020-08-18 11:29:33,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7ad1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:33, skipping insertion in model container [2020-08-18 11:29:33,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:33" (2/3) ... [2020-08-18 11:29:33,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7ad1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:33, skipping insertion in model container [2020-08-18 11:29:33,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:33" (3/3) ... [2020-08-18 11:29:33,872 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-08-18 11:29:33,884 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:29:33,893 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:29:33,908 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:29:33,937 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:29:33,937 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:29:33,937 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:29:33,937 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:29:33,938 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:29:33,938 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:29:33,938 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:29:33,939 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:29:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-08-18 11:29:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:29:33,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:33,977 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 11:29:33,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash 742963907, now seen corresponding path program 1 times [2020-08-18 11:29:33,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:33,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72572252] [2020-08-18 11:29:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:29:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:29:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:29:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 11:29:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 11:29:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:34,658 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 11:29:34,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72572252] [2020-08-18 11:29:34,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:34,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 11:29:34,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849738458] [2020-08-18 11:29:34,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:29:34,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:29:34,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:29:34,687 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 10 states. [2020-08-18 11:29:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:37,330 INFO L93 Difference]: Finished difference Result 552 states and 918 transitions. [2020-08-18 11:29:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 11:29:37,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 11:29:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:37,352 INFO L225 Difference]: With dead ends: 552 [2020-08-18 11:29:37,352 INFO L226 Difference]: Without dead ends: 416 [2020-08-18 11:29:37,359 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 11:29:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-18 11:29:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 234. [2020-08-18 11:29:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-18 11:29:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 306 transitions. [2020-08-18 11:29:37,487 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 306 transitions. Word has length 70 [2020-08-18 11:29:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:37,488 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 306 transitions. [2020-08-18 11:29:37,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:29:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 306 transitions. [2020-08-18 11:29:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:29:37,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:37,493 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 11:29:37,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:29:37,493 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1190139517, now seen corresponding path program 1 times [2020-08-18 11:29:37,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:37,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744337608] [2020-08-18 11:29:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:29:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:29:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:29:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 11:29:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 11:29:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:37,787 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 11:29:37,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744337608] [2020-08-18 11:29:37,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:37,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 11:29:37,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51978912] [2020-08-18 11:29:37,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:29:37,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:29:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:29:37,791 INFO L87 Difference]: Start difference. First operand 234 states and 306 transitions. Second operand 10 states. [2020-08-18 11:29:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:40,745 INFO L93 Difference]: Finished difference Result 805 states and 1159 transitions. [2020-08-18 11:29:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 11:29:40,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 11:29:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:40,754 INFO L225 Difference]: With dead ends: 805 [2020-08-18 11:29:40,754 INFO L226 Difference]: Without dead ends: 598 [2020-08-18 11:29:40,761 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 11:29:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-08-18 11:29:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 360. [2020-08-18 11:29:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 11:29:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2020-08-18 11:29:40,836 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 70 [2020-08-18 11:29:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:40,836 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2020-08-18 11:29:40,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:29:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2020-08-18 11:29:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:29:40,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:40,841 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 11:29:40,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:29:40,841 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1543227899, now seen corresponding path program 1 times [2020-08-18 11:29:40,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:40,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57361198] [2020-08-18 11:29:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:40,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:29:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:29:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:29:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 11:29:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 11:29:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:41,101 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 11:29:41,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57361198] [2020-08-18 11:29:41,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:41,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:29:41,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363549749] [2020-08-18 11:29:41,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:29:41,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:29:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:29:41,104 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand 11 states. [2020-08-18 11:29:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:42,840 INFO L93 Difference]: Finished difference Result 858 states and 1207 transitions. [2020-08-18 11:29:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 11:29:42,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-18 11:29:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:42,846 INFO L225 Difference]: With dead ends: 858 [2020-08-18 11:29:42,846 INFO L226 Difference]: Without dead ends: 541 [2020-08-18 11:29:42,848 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 11:29:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-18 11:29:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 365. [2020-08-18 11:29:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-08-18 11:29:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 479 transitions. [2020-08-18 11:29:42,897 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 479 transitions. Word has length 70 [2020-08-18 11:29:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:42,897 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 479 transitions. [2020-08-18 11:29:42,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:29:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 479 transitions. [2020-08-18 11:29:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:29:42,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:42,900 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 11:29:42,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:29:42,901 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash 507756099, now seen corresponding path program 1 times [2020-08-18 11:29:42,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:42,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128563834] [2020-08-18 11:29:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:42,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:29:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:29:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:29:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 11:29:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 11:29:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:43,105 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 11:29:43,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128563834] [2020-08-18 11:29:43,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:43,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 11:29:43,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66726006] [2020-08-18 11:29:43,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:29:43,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:29:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:29:43,108 INFO L87 Difference]: Start difference. First operand 365 states and 479 transitions. Second operand 10 states. [2020-08-18 11:29:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:45,761 INFO L93 Difference]: Finished difference Result 1300 states and 1859 transitions. [2020-08-18 11:29:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 11:29:45,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 11:29:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:45,769 INFO L225 Difference]: With dead ends: 1300 [2020-08-18 11:29:45,769 INFO L226 Difference]: Without dead ends: 978 [2020-08-18 11:29:45,772 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 11:29:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-08-18 11:29:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 691. [2020-08-18 11:29:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-08-18 11:29:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 892 transitions. [2020-08-18 11:29:45,845 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 892 transitions. Word has length 70 [2020-08-18 11:29:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:45,845 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 892 transitions. [2020-08-18 11:29:45,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:29:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 892 transitions. [2020-08-18 11:29:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:29:45,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:45,848 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 11:29:45,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:29:45,848 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1263714876, now seen corresponding path program 1 times [2020-08-18 11:29:45,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:45,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351745508] [2020-08-18 11:29:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:29:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:29:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:45,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:29:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 11:29:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 11:29:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:46,103 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 11:29:46,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351745508] [2020-08-18 11:29:46,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:46,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:29:46,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489276132] [2020-08-18 11:29:46,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:29:46,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:46,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:29:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:29:46,106 INFO L87 Difference]: Start difference. First operand 691 states and 892 transitions. Second operand 11 states. [2020-08-18 11:29:47,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:47,977 INFO L93 Difference]: Finished difference Result 1616 states and 2202 transitions. [2020-08-18 11:29:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 11:29:47,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-18 11:29:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:47,988 INFO L225 Difference]: With dead ends: 1616 [2020-08-18 11:29:47,989 INFO L226 Difference]: Without dead ends: 968 [2020-08-18 11:29:47,993 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 11:29:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-18 11:29:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 706. [2020-08-18 11:29:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-08-18 11:29:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 904 transitions. [2020-08-18 11:29:48,126 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 904 transitions. Word has length 70 [2020-08-18 11:29:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:48,126 INFO L479 AbstractCegarLoop]: Abstraction has 706 states and 904 transitions. [2020-08-18 11:29:48,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:29:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 904 transitions. [2020-08-18 11:29:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:29:48,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:48,131 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 11:29:48,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:29:48,131 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:48,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1123166266, now seen corresponding path program 1 times [2020-08-18 11:29:48,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:48,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293037894] [2020-08-18 11:29:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:29:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:29:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:29:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:29:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 11:29:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:29:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:29:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 11:29:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 11:29:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 11:29:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:29:48,387 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 11:29:48,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293037894] [2020-08-18 11:29:48,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:29:48,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 11:29:48,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302456929] [2020-08-18 11:29:48,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:29:48,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:29:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:29:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:29:48,396 INFO L87 Difference]: Start difference. First operand 706 states and 904 transitions. Second operand 10 states. [2020-08-18 11:29:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:29:50,784 INFO L93 Difference]: Finished difference Result 1675 states and 2255 transitions. [2020-08-18 11:29:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 11:29:50,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-18 11:29:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:29:50,799 INFO L225 Difference]: With dead ends: 1675 [2020-08-18 11:29:50,799 INFO L226 Difference]: Without dead ends: 1111 [2020-08-18 11:29:50,802 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 11:29:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-18 11:29:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 722. [2020-08-18 11:29:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-08-18 11:29:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 913 transitions. [2020-08-18 11:29:50,878 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 913 transitions. Word has length 70 [2020-08-18 11:29:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:29:50,879 INFO L479 AbstractCegarLoop]: Abstraction has 722 states and 913 transitions. [2020-08-18 11:29:50,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:29:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 913 transitions. [2020-08-18 11:29:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 11:29:50,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:29:50,880 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 11:29:50,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:29:50,881 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:29:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:29:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1940814716, now seen corresponding path program 1 times [2020-08-18 11:29:50,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:29:50,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985701851] [2020-08-18 11:29:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:29:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:29:50,906 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:29:50,907 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:29:50,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:29:50,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:29:50 BoogieIcfgContainer [2020-08-18 11:29:50,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:29:50,952 INFO L168 Benchmark]: Toolchain (without parser) took 18282.36 ms. Allocated memory was 148.4 MB in the beginning and 444.6 MB in the end (delta: 296.2 MB). Free memory was 103.9 MB in the beginning and 116.7 MB in the end (delta: -12.8 MB). Peak memory consumption was 283.4 MB. Max. memory is 7.1 GB. [2020-08-18 11:29:50,954 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 11:29:50,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 551.67 ms. Allocated memory was 148.4 MB in the beginning and 202.9 MB in the end (delta: 54.5 MB). Free memory was 103.7 MB in the beginning and 179.7 MB in the end (delta: -75.9 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-08-18 11:29:50,960 INFO L168 Benchmark]: Boogie Preprocessor took 42.78 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:29:50,961 INFO L168 Benchmark]: RCFGBuilder took 597.66 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 145.7 MB in the end (delta: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2020-08-18 11:29:50,962 INFO L168 Benchmark]: TraceAbstraction took 17083.72 ms. Allocated memory was 202.9 MB in the beginning and 444.6 MB in the end (delta: 241.7 MB). Free memory was 145.0 MB in the beginning and 116.7 MB in the end (delta: 28.3 MB). Peak memory consumption was 270.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:29:50,973 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 551.67 ms. Allocated memory was 148.4 MB in the beginning and 202.9 MB in the end (delta: 54.5 MB). Free memory was 103.7 MB in the beginning and 179.7 MB in the end (delta: -75.9 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.78 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 597.66 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 145.7 MB in the end (delta: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17083.72 ms. Allocated memory was 202.9 MB in the beginning and 444.6 MB in the end (delta: 241.7 MB). Free memory was 145.0 MB in the beginning and 116.7 MB in the end (delta: 28.3 MB). Peak memory consumption was 270.0 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, 1131 SDs, 0 SdLazy, 8331 SolverSat, 2228 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, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=722occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 6 MinimizatonAttempts, 1534 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s 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...