/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:33:17,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:33:17,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:33:17,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:33:17,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:33:17,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:33:17,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:33:17,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:33:17,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:33:17,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:33:17,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:33:17,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:33:17,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:33:17,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:33:17,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:33:17,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:33:17,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:33:17,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:33:17,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:33:17,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:33:17,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:33:17,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:33:17,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:33:17,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:33:17,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:33:17,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:33:17,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:33:17,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:33:17,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:33:17,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:33:17,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:33:17,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:33:17,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:33:17,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:33:17,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:33:17,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:33:17,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:33:17,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:33:17,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:33:17,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:33:17,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:33:17,459 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 [2020-09-21 11:33:17,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:33:17,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:33:17,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:33:17,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:33:17,506 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:33:17,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:33:17,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:33:17,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:33:17,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:33:17,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:33:17,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:33:17,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:33:17,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:33:17,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:33:17,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:33:17,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:33:17,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:33:17,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:33:17,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:33:17,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:33:17,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:33:17,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:33:17,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:33:17,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:33:17,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:33:17,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:33:17,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:33:17,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:33:17,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:33:17,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:33:17,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:33:17,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:33:17,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:33:17,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:33:17,985 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:33:17,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-09-21 11:33:18,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b933040e6/1df7c0ac87404f6280f231edea376209/FLAG76902bf63 [2020-09-21 11:33:18,675 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:33:18,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-09-21 11:33:18,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b933040e6/1df7c0ac87404f6280f231edea376209/FLAG76902bf63 [2020-09-21 11:33:19,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b933040e6/1df7c0ac87404f6280f231edea376209 [2020-09-21 11:33:19,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:33:19,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:33:19,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:33:19,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:33:19,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:33:19,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678b2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19, skipping insertion in model container [2020-09-21 11:33:19,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:33:19,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:33:19,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:33:19,407 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:33:19,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:33:19,605 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:33:19,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19 WrapperNode [2020-09-21 11:33:19,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:33:19,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:33:19,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:33:19,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:33:19,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (1/1) ... [2020-09-21 11:33:19,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:33:19,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:33:19,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:33:19,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:33:19,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (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 [2020-09-21 11:33:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:33:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:33:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-09-21 11:33:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2020-09-21 11:33:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-09-21 11:33:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-09-21 11:33:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-09-21 11:33:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-09-21 11:33:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-09-21 11:33:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-09-21 11:33:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-09-21 11:33:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-09-21 11:33:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-09-21 11:33:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-09-21 11:33:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-09-21 11:33:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-09-21 11:33:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-09-21 11:33:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-09-21 11:33:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-09-21 11:33:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:33:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:33:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:33:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-09-21 11:33:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2020-09-21 11:33:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-09-21 11:33:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-09-21 11:33:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-09-21 11:33:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-09-21 11:33:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-09-21 11:33:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-09-21 11:33:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-09-21 11:33:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-09-21 11:33:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-09-21 11:33:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-09-21 11:33:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-09-21 11:33:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-09-21 11:33:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-09-21 11:33:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-09-21 11:33:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-09-21 11:33:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:33:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:33:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:33:20,285 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:33:20,286 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 11:33:20,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:33:20 BoogieIcfgContainer [2020-09-21 11:33:20,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:33:20,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:33:20,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:33:20,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:33:20,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:33:19" (1/3) ... [2020-09-21 11:33:20,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173ac200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:33:20, skipping insertion in model container [2020-09-21 11:33:20,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:19" (2/3) ... [2020-09-21 11:33:20,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173ac200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:33:20, skipping insertion in model container [2020-09-21 11:33:20,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:33:20" (3/3) ... [2020-09-21 11:33:20,302 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-09-21 11:33:20,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:33:20,325 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:33:20,348 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:33:20,381 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:33:20,381 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:33:20,381 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:33:20,382 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:33:20,382 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:33:20,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:33:20,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:33:20,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:33:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-09-21 11:33:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:33:20,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:20,429 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] [2020-09-21 11:33:20,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:20,436 INFO L82 PathProgramCache]: Analyzing trace with hash 742963907, now seen corresponding path program 1 times [2020-09-21 11:33:20,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:20,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746138876] [2020-09-21 11:33:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:20,829 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:20,829 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:20,830 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:20,830 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:20,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 11:33:20,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:20,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-21 11:33:20,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:33:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:33:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:33:20,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:21,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,051 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,051 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,051 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,052 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:21,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:21,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:21,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:21,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:21,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:33:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,109 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,110 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:21,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:33:21,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:33:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:21,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:33:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,147 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,148 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,148 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,148 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:21,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:33:21,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:33:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:33:21,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 11:33:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,194 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,195 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,195 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,196 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:21,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:21,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:21,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:21,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:21,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-09-21 11:33:21,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:33:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,264 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,264 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,265 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,265 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:21,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:33:21,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:21,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:33:21,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:33:21,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:21,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-21 11:33:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,293 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,294 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,294 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,294 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:33:21,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:21,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:21,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-21 11:33:21,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:21,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:21,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:33:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,305 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,305 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,305 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,306 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:21,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:21,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:21,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:21,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:21,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:21,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:33:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,313 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,313 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,313 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,314 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:21,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:21,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:21,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:21,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 11:33:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,324 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,324 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,324 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,325 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:21,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:21,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:21,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:21,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:21,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:21,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 11:33:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,333 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:21,333 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,333 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,334 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:33:21,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:21,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:33:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:21,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:21,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746138876] [2020-09-21 11:33:21,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:21,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 11:33:21,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137241231] [2020-09-21 11:33:21,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:33:21,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:21,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:33:21,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:33:21,383 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 10 states. [2020-09-21 11:33:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:24,006 INFO L93 Difference]: Finished difference Result 536 states and 882 transitions. [2020-09-21 11:33:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:33:24,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-09-21 11:33:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:24,035 INFO L225 Difference]: With dead ends: 536 [2020-09-21 11:33:24,035 INFO L226 Difference]: Without dead ends: 402 [2020-09-21 11:33:24,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:33:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-09-21 11:33:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 234. [2020-09-21 11:33:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-21 11:33:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 308 transitions. [2020-09-21 11:33:24,165 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 308 transitions. Word has length 70 [2020-09-21 11:33:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:24,166 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 308 transitions. [2020-09-21 11:33:24,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:33:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 308 transitions. [2020-09-21 11:33:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:33:24,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:24,171 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] [2020-09-21 11:33:24,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:33:24,172 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:24,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1190139517, now seen corresponding path program 1 times [2020-09-21 11:33:24,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:24,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380971172] [2020-09-21 11:33:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,249 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:24,249 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,250 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,250 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 11:33:24,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 11:33:24,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:33:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:33:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 11:33:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,327 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,328 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,328 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,328 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:24,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:24,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:24,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:24,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:33:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,366 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,366 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,367 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,367 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:24,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:33:24,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:33:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:33:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,396 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,396 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,396 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,397 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:24,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:33:24,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:24,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:33:24,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:33:24,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 11:33:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,427 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,427 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,427 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,428 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:24,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:24,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:33:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,453 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,453 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,453 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,453 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:24,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:33:24,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 11:33:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:33:24,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-21 11:33:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,498 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,498 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,498 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,499 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:33:24,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:33:24,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:24,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-21 11:33:24,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:24,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:33:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,512 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,513 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,513 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,513 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:24,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:24,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:24,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:24,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:24,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:33:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,522 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,522 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,522 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:24,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:24,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:24,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:24,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:24,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:24,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 11:33:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,536 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,538 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,538 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,538 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:24,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:24,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:24,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:24,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:24,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:24,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 11:33:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,553 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:24,553 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,553 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,555 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:33:24,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:24,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:24,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:33:24,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:24,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:24,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380971172] [2020-09-21 11:33:24,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:24,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 11:33:24,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049526379] [2020-09-21 11:33:24,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:33:24,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:33:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:33:24,592 INFO L87 Difference]: Start difference. First operand 234 states and 308 transitions. Second operand 11 states. [2020-09-21 11:33:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:27,183 INFO L93 Difference]: Finished difference Result 937 states and 1396 transitions. [2020-09-21 11:33:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:33:27,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-09-21 11:33:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:27,196 INFO L225 Difference]: With dead ends: 937 [2020-09-21 11:33:27,196 INFO L226 Difference]: Without dead ends: 728 [2020-09-21 11:33:27,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:33:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-09-21 11:33:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 469. [2020-09-21 11:33:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-09-21 11:33:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 624 transitions. [2020-09-21 11:33:27,305 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 624 transitions. Word has length 70 [2020-09-21 11:33:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:27,305 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 624 transitions. [2020-09-21 11:33:27,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:33:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 624 transitions. [2020-09-21 11:33:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:33:27,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:27,310 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] [2020-09-21 11:33:27,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:33:27,310 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:27,310 INFO L82 PathProgramCache]: Analyzing trace with hash 162619972, now seen corresponding path program 1 times [2020-09-21 11:33:27,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:27,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035368218] [2020-09-21 11:33:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,345 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,345 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,346 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,346 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 11:33:27,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:33:27,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:33:27,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-21 11:33:27,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:27,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,408 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,408 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,408 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,408 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:27,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:27,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:33:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,436 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,436 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,436 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,436 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:27,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:33:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,453 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,453 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,453 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,453 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:27,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:27,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 11:33:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,470 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,471 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,471 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,471 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:27,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:33:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,486 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,487 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,487 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,487 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:27,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-21 11:33:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,502 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,502 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,502 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,503 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:33:27,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:33:27,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:33:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 11:33:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:33:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,556 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,557 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,557 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,557 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:27,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:33:27,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:33:27,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:33:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,593 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,594 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,594 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,594 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:27,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-21 11:33:27,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 11:33:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,601 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,601 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,602 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,602 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:27,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 11:33:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,608 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:27,608 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,608 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,608 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:33:27,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:27,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:33:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:27,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:27,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035368218] [2020-09-21 11:33:27,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:27,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 11:33:27,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367482939] [2020-09-21 11:33:27,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:33:27,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:27,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:33:27,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:33:27,621 INFO L87 Difference]: Start difference. First operand 469 states and 624 transitions. Second operand 11 states. [2020-09-21 11:33:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:29,560 INFO L93 Difference]: Finished difference Result 1131 states and 1596 transitions. [2020-09-21 11:33:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:33:29,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-09-21 11:33:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:29,567 INFO L225 Difference]: With dead ends: 1131 [2020-09-21 11:33:29,567 INFO L226 Difference]: Without dead ends: 703 [2020-09-21 11:33:29,569 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 [2020-09-21 11:33:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-09-21 11:33:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 479. [2020-09-21 11:33:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-09-21 11:33:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 632 transitions. [2020-09-21 11:33:29,653 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 632 transitions. Word has length 70 [2020-09-21 11:33:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:29,656 INFO L479 AbstractCegarLoop]: Abstraction has 479 states and 632 transitions. [2020-09-21 11:33:29,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:33:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 632 transitions. [2020-09-21 11:33:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:33:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:29,664 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] [2020-09-21 11:33:29,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:33:29,664 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2081363326, now seen corresponding path program 1 times [2020-09-21 11:33:29,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:29,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027695146] [2020-09-21 11:33:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,713 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,713 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,713 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,713 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 11:33:29,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:33:29,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:33:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-09-21 11:33:29,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:29,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,787 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,787 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,787 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,787 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:29,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:33:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,814 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,815 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,815 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,815 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:29,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:33:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,832 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,832 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,832 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,833 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:29,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 11:33:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,847 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,847 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,847 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,848 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:29,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:33:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,869 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,870 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,870 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,870 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:29,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-21 11:33:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,884 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,884 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,884 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,885 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:33:29,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:33:29,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:33:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 11:33:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:33:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,909 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,909 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,910 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,910 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:29,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:29,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:29,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:33:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,920 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,920 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,920 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,920 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:33:29,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:33:29,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:33:29,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 11:33:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,946 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,946 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,946 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,946 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:29,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:29,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 11:33:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:29,951 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:29,952 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:29,952 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:29,952 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:29,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:33:29,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:29,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:29,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:29,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:29,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:33:29,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:29,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027695146] [2020-09-21 11:33:29,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:29,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 11:33:29,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183891368] [2020-09-21 11:33:29,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:33:29,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:33:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:33:29,964 INFO L87 Difference]: Start difference. First operand 479 states and 632 transitions. Second operand 11 states. [2020-09-21 11:33:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:31,827 INFO L93 Difference]: Finished difference Result 1149 states and 1605 transitions. [2020-09-21 11:33:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:33:31,828 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-09-21 11:33:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:31,834 INFO L225 Difference]: With dead ends: 1149 [2020-09-21 11:33:31,834 INFO L226 Difference]: Without dead ends: 711 [2020-09-21 11:33:31,837 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 [2020-09-21 11:33:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-09-21 11:33:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 489. [2020-09-21 11:33:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-09-21 11:33:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 640 transitions. [2020-09-21 11:33:31,895 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 640 transitions. Word has length 70 [2020-09-21 11:33:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:31,896 INFO L479 AbstractCegarLoop]: Abstraction has 489 states and 640 transitions. [2020-09-21 11:33:31,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:33:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 640 transitions. [2020-09-21 11:33:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:33:31,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:31,898 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] [2020-09-21 11:33:31,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:33:31,898 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:31,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1940814716, now seen corresponding path program 1 times [2020-09-21 11:33:31,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:31,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313629506] [2020-09-21 11:33:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:33:31,936 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:33:31,936 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:33:31,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:33:31,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:33:31 BoogieIcfgContainer [2020-09-21 11:33:31,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:33:31,972 INFO L168 Benchmark]: Toolchain (without parser) took 12921.06 ms. Allocated memory was 140.0 MB in the beginning and 368.1 MB in the end (delta: 228.1 MB). Free memory was 102.1 MB in the beginning and 94.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 235.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:31,973 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:33:31,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 550.82 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 101.5 MB in the beginning and 181.7 MB in the end (delta: -80.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:31,975 INFO L168 Benchmark]: Boogie Preprocessor took 50.56 ms. Allocated memory is still 205.0 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:31,976 INFO L168 Benchmark]: RCFGBuilder took 634.59 ms. Allocated memory is still 205.0 MB. Free memory was 179.4 MB in the beginning and 148.0 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:31,977 INFO L168 Benchmark]: TraceAbstraction took 11675.38 ms. Allocated memory was 205.0 MB in the beginning and 368.1 MB in the end (delta: 163.1 MB). Free memory was 147.3 MB in the beginning and 94.8 MB in the end (delta: 52.5 MB). Peak memory consumption was 215.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:31,981 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 550.82 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 101.5 MB in the beginning and 181.7 MB in the end (delta: -80.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.56 ms. Allocated memory is still 205.0 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 634.59 ms. Allocated memory is still 205.0 MB. Free memory was 179.4 MB in the beginning and 148.0 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11675.38 ms. Allocated memory was 205.0 MB in the beginning and 368.1 MB in the end (delta: 163.1 MB). Free memory was 147.3 MB in the beginning and 94.8 MB in the end (delta: 52.5 MB). Peak memory consumption was 215.6 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: 11.5s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 529 SDtfs, 2307 SDslu, 686 SDs, 0 SdLazy, 4683 SolverSat, 1384 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=489occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 4 MinimizatonAttempts, 873 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 350 NumberOfCodeBlocks, 350 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 276 ConstructedInterpolants, 0 QuantifiedInterpolants, 57546 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...