/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/token_ring.01.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:56:55,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:56:55,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:56:55,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:56:55,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:56:55,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:56:55,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:56:55,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:56:55,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:56:55,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:56:55,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:56:55,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:56:55,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:56:55,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:56:55,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:56:55,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:56:55,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:56:55,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:56:55,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:56:55,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:56:55,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:56:55,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:56:55,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:56:55,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:56:55,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:56:55,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:56:55,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:56:55,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:56:55,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:56:55,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:56:55,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:56:55,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:56:55,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:56:55,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:56:55,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:56:55,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:56:55,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:56:55,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:56:55,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:56:55,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:56:55,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:56:55,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:56:55,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:56:55,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:56:55,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:56:55,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:56:55,601 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:56:55,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:56:55,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:56:55,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:56:55,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:56:55,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:56:55,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:56:55,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:56:55,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:56:55,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:56:55,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:56:55,605 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:56:55,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:56:55,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:56:55,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:56:55,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:56:55,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:56:55,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:56:55,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:56:55,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:56:55,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:56:55,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:56:55,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:56:55,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:56:55,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:56:55,608 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 -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:56:55,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:56:55,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:56:55,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:56:55,925 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:56:55,926 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:56:55,927 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2020-08-21 23:56:55,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73dda0dec/b9f6d89eff6f4e27bd60fc4be82d29da/FLAGbe00ad7e0 [2020-08-21 23:56:56,521 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:56:56,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2020-08-21 23:56:56,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73dda0dec/b9f6d89eff6f4e27bd60fc4be82d29da/FLAGbe00ad7e0 [2020-08-21 23:56:56,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73dda0dec/b9f6d89eff6f4e27bd60fc4be82d29da [2020-08-21 23:56:56,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:56:56,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:56:56,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:56:56,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:56:56,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:56:56,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:56:56" (1/1) ... [2020-08-21 23:56:56,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43fb007c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:56, skipping insertion in model container [2020-08-21 23:56:56,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:56:56" (1/1) ... [2020-08-21 23:56:56,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:56:56,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:56:57,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:56:57,076 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:56:57,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:56:57,205 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:56:57,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57 WrapperNode [2020-08-21 23:56:57,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:56:57,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:56:57,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:56:57,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:56:57,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:56:57,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:56:57,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:56:57,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:56:57,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:56:57,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:56:57,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:56:57,318 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 23:56:57,318 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-21 23:56:57,318 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-21 23:56:57,318 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-21 23:56:57,318 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-21 23:56:57,318 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-21 23:56:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 23:56:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 23:56:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 23:56:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-21 23:56:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-21 23:56:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-21 23:56:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-21 23:56:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-21 23:56:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-21 23:56:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 23:56:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 23:56:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 23:56:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:56:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:56:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 23:56:57,322 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-21 23:56:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-21 23:56:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-21 23:56:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:56:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-21 23:56:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-21 23:56:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-21 23:56:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 23:56:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 23:56:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 23:56:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-21 23:56:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-21 23:56:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-21 23:56:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-21 23:56:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-21 23:56:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 23:56:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 23:56:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 23:56:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:56:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:56:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:56:57,845 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:56:57,845 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 23:56:57,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:56:57 BoogieIcfgContainer [2020-08-21 23:56:57,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:56:57,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:56:57,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:56:57,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:56:57,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:56:56" (1/3) ... [2020-08-21 23:56:57,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7024b77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:56:57, skipping insertion in model container [2020-08-21 23:56:57,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (2/3) ... [2020-08-21 23:56:57,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7024b77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:56:57, skipping insertion in model container [2020-08-21 23:56:57,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:56:57" (3/3) ... [2020-08-21 23:56:57,860 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-2.c [2020-08-21 23:56:57,871 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:56:57,880 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:56:57,894 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:56:57,921 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:56:57,921 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:56:57,922 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:56:57,922 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:56:57,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:56:57,922 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:56:57,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:56:57,923 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:56:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states. [2020-08-21 23:56:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 23:56:57,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:56:57,960 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:56:57,960 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:56:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:56:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash -540085109, now seen corresponding path program 1 times [2020-08-21 23:56:57,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:56:57,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024897090] [2020-08-21 23:56:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:56:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:56:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:56:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:56:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:56:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:56:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:56:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:56:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:56:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:56:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:56:58,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024897090] [2020-08-21 23:56:58,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:56:58,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:56:58,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048995314] [2020-08-21 23:56:58,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:56:58,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:58,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:56:58,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:56:58,610 INFO L87 Difference]: Start difference. First operand 151 states. Second operand 9 states. [2020-08-21 23:57:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:00,863 INFO L93 Difference]: Finished difference Result 522 states and 794 transitions. [2020-08-21 23:57:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:57:00,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-21 23:57:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:00,883 INFO L225 Difference]: With dead ends: 522 [2020-08-21 23:57:00,884 INFO L226 Difference]: Without dead ends: 371 [2020-08-21 23:57:00,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:57:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-21 23:57:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 257. [2020-08-21 23:57:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-21 23:57:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 346 transitions. [2020-08-21 23:57:00,991 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 346 transitions. Word has length 78 [2020-08-21 23:57:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:00,992 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 346 transitions. [2020-08-21 23:57:00,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:57:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 346 transitions. [2020-08-21 23:57:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 23:57:00,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:00,996 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:00,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:57:00,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash 211359051, now seen corresponding path program 1 times [2020-08-21 23:57:00,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:00,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45810784] [2020-08-21 23:57:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:57:01,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45810784] [2020-08-21 23:57:01,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:01,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:01,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244635070] [2020-08-21 23:57:01,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:01,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:01,211 INFO L87 Difference]: Start difference. First operand 257 states and 346 transitions. Second operand 10 states. [2020-08-21 23:57:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:02,356 INFO L93 Difference]: Finished difference Result 599 states and 848 transitions. [2020-08-21 23:57:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:57:02,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-21 23:57:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:02,367 INFO L225 Difference]: With dead ends: 599 [2020-08-21 23:57:02,367 INFO L226 Difference]: Without dead ends: 361 [2020-08-21 23:57:02,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:57:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-08-21 23:57:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 257. [2020-08-21 23:57:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-21 23:57:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 339 transitions. [2020-08-21 23:57:02,459 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 339 transitions. Word has length 78 [2020-08-21 23:57:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:02,460 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 339 transitions. [2020-08-21 23:57:02,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 339 transitions. [2020-08-21 23:57:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 23:57:02,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:02,464 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:02,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:57:02,464 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2119705461, now seen corresponding path program 1 times [2020-08-21 23:57:02,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:02,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234313085] [2020-08-21 23:57:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:57:02,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234313085] [2020-08-21 23:57:02,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:02,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:02,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243917973] [2020-08-21 23:57:02,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:02,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:02,681 INFO L87 Difference]: Start difference. First operand 257 states and 339 transitions. Second operand 10 states. [2020-08-21 23:57:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:04,137 INFO L93 Difference]: Finished difference Result 722 states and 1058 transitions. [2020-08-21 23:57:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:57:04,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-21 23:57:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:04,142 INFO L225 Difference]: With dead ends: 722 [2020-08-21 23:57:04,143 INFO L226 Difference]: Without dead ends: 484 [2020-08-21 23:57:04,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-08-21 23:57:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-08-21 23:57:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 309. [2020-08-21 23:57:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-08-21 23:57:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 392 transitions. [2020-08-21 23:57:04,190 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 392 transitions. Word has length 78 [2020-08-21 23:57:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:04,190 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 392 transitions. [2020-08-21 23:57:04,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 392 transitions. [2020-08-21 23:57:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 23:57:04,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:04,193 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:04,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:57:04,193 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -579817174, now seen corresponding path program 1 times [2020-08-21 23:57:04,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:04,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929114750] [2020-08-21 23:57:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:57:04,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929114750] [2020-08-21 23:57:04,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:04,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:04,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857842132] [2020-08-21 23:57:04,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:04,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:04,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:04,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:04,371 INFO L87 Difference]: Start difference. First operand 309 states and 392 transitions. Second operand 10 states. [2020-08-21 23:57:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:05,782 INFO L93 Difference]: Finished difference Result 744 states and 1001 transitions. [2020-08-21 23:57:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:57:05,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-21 23:57:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:05,788 INFO L225 Difference]: With dead ends: 744 [2020-08-21 23:57:05,788 INFO L226 Difference]: Without dead ends: 455 [2020-08-21 23:57:05,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-08-21 23:57:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-08-21 23:57:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 329. [2020-08-21 23:57:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-08-21 23:57:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 412 transitions. [2020-08-21 23:57:05,827 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 412 transitions. Word has length 78 [2020-08-21 23:57:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:05,827 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 412 transitions. [2020-08-21 23:57:05,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 412 transitions. [2020-08-21 23:57:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 23:57:05,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:05,829 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:05,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:57:05,830 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash -156170452, now seen corresponding path program 1 times [2020-08-21 23:57:05,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:05,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257123353] [2020-08-21 23:57:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:05,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:05,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:05,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:05,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:05,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:05,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:57:06,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257123353] [2020-08-21 23:57:06,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:06,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:06,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784421219] [2020-08-21 23:57:06,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:06,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:06,047 INFO L87 Difference]: Start difference. First operand 329 states and 412 transitions. Second operand 10 states. [2020-08-21 23:57:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:07,393 INFO L93 Difference]: Finished difference Result 774 states and 1027 transitions. [2020-08-21 23:57:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 23:57:07,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-21 23:57:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:07,398 INFO L225 Difference]: With dead ends: 774 [2020-08-21 23:57:07,399 INFO L226 Difference]: Without dead ends: 465 [2020-08-21 23:57:07,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:57:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-08-21 23:57:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 339. [2020-08-21 23:57:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-08-21 23:57:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 420 transitions. [2020-08-21 23:57:07,431 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 420 transitions. Word has length 78 [2020-08-21 23:57:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:07,431 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 420 transitions. [2020-08-21 23:57:07,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 420 transitions. [2020-08-21 23:57:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 23:57:07,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:07,433 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:07,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:57:07,434 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:07,434 INFO L82 PathProgramCache]: Analyzing trace with hash 118589162, now seen corresponding path program 1 times [2020-08-21 23:57:07,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:07,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793169535] [2020-08-21 23:57:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:57:07,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793169535] [2020-08-21 23:57:07,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:07,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:07,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149316638] [2020-08-21 23:57:07,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:07,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:07,582 INFO L87 Difference]: Start difference. First operand 339 states and 420 transitions. Second operand 10 states. [2020-08-21 23:57:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:09,007 INFO L93 Difference]: Finished difference Result 920 states and 1216 transitions. [2020-08-21 23:57:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 23:57:09,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-21 23:57:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:09,016 INFO L225 Difference]: With dead ends: 920 [2020-08-21 23:57:09,016 INFO L226 Difference]: Without dead ends: 600 [2020-08-21 23:57:09,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:57:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-08-21 23:57:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 375. [2020-08-21 23:57:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-08-21 23:57:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 445 transitions. [2020-08-21 23:57:09,063 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 445 transitions. Word has length 78 [2020-08-21 23:57:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:09,063 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 445 transitions. [2020-08-21 23:57:09,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 445 transitions. [2020-08-21 23:57:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 23:57:09,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:09,066 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:09,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:57:09,066 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash 180628776, now seen corresponding path program 1 times [2020-08-21 23:57:09,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:09,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275051300] [2020-08-21 23:57:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:57:09,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275051300] [2020-08-21 23:57:09,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:09,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:57:09,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708071824] [2020-08-21 23:57:09,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:57:09,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:57:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:57:09,205 INFO L87 Difference]: Start difference. First operand 375 states and 445 transitions. Second operand 7 states. [2020-08-21 23:57:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:10,397 INFO L93 Difference]: Finished difference Result 1208 states and 1535 transitions. [2020-08-21 23:57:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:57:10,397 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-08-21 23:57:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:10,403 INFO L225 Difference]: With dead ends: 1208 [2020-08-21 23:57:10,403 INFO L226 Difference]: Without dead ends: 853 [2020-08-21 23:57:10,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:57:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-08-21 23:57:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 751. [2020-08-21 23:57:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 751 states. [2020-08-21 23:57:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 921 transitions. [2020-08-21 23:57:10,479 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 921 transitions. Word has length 78 [2020-08-21 23:57:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:10,480 INFO L479 AbstractCegarLoop]: Abstraction has 751 states and 921 transitions. [2020-08-21 23:57:10,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:57:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 921 transitions. [2020-08-21 23:57:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-21 23:57:10,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:10,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:10,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:57:10,483 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash 972462964, now seen corresponding path program 1 times [2020-08-21 23:57:10,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:10,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809006779] [2020-08-21 23:57:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 23:57:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-21 23:57:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 23:57:10,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809006779] [2020-08-21 23:57:10,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:10,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:57:10,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785379832] [2020-08-21 23:57:10,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:57:10,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:57:10,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:57:10,723 INFO L87 Difference]: Start difference. First operand 751 states and 921 transitions. Second operand 9 states. [2020-08-21 23:57:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:12,547 INFO L93 Difference]: Finished difference Result 2122 states and 2794 transitions. [2020-08-21 23:57:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:57:12,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-08-21 23:57:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:12,561 INFO L225 Difference]: With dead ends: 2122 [2020-08-21 23:57:12,562 INFO L226 Difference]: Without dead ends: 1391 [2020-08-21 23:57:12,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-08-21 23:57:12,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2020-08-21 23:57:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1307. [2020-08-21 23:57:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2020-08-21 23:57:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1584 transitions. [2020-08-21 23:57:12,685 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1584 transitions. Word has length 123 [2020-08-21 23:57:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:12,685 INFO L479 AbstractCegarLoop]: Abstraction has 1307 states and 1584 transitions. [2020-08-21 23:57:12,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:57:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1584 transitions. [2020-08-21 23:57:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-21 23:57:12,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:12,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:12,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:57:12,689 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:12,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1319133239, now seen corresponding path program 1 times [2020-08-21 23:57:12,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:12,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313610565] [2020-08-21 23:57:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 23:57:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-21 23:57:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-21 23:57:12,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313610565] [2020-08-21 23:57:12,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:12,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:57:12,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347468461] [2020-08-21 23:57:12,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:57:12,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:57:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:57:12,892 INFO L87 Difference]: Start difference. First operand 1307 states and 1584 transitions. Second operand 9 states. [2020-08-21 23:57:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:14,807 INFO L93 Difference]: Finished difference Result 3361 states and 4209 transitions. [2020-08-21 23:57:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:57:14,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-08-21 23:57:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:14,822 INFO L225 Difference]: With dead ends: 3361 [2020-08-21 23:57:14,822 INFO L226 Difference]: Without dead ends: 1577 [2020-08-21 23:57:14,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:57:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-08-21 23:57:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1511. [2020-08-21 23:57:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1511 states. [2020-08-21 23:57:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1789 transitions. [2020-08-21 23:57:14,957 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1789 transitions. Word has length 123 [2020-08-21 23:57:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:14,960 INFO L479 AbstractCegarLoop]: Abstraction has 1511 states and 1789 transitions. [2020-08-21 23:57:14,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:57:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1789 transitions. [2020-08-21 23:57:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 23:57:14,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:14,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:14,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:57:14,968 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1505336733, now seen corresponding path program 1 times [2020-08-21 23:57:14,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:14,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378969789] [2020-08-21 23:57:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 23:57:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 23:57:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 23:57:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 23:57:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-21 23:57:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-08-21 23:57:15,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378969789] [2020-08-21 23:57:15,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:15,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:57:15,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676939029] [2020-08-21 23:57:15,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:57:15,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:57:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:57:15,266 INFO L87 Difference]: Start difference. First operand 1511 states and 1789 transitions. Second operand 9 states. [2020-08-21 23:57:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:16,705 INFO L93 Difference]: Finished difference Result 3075 states and 3746 transitions. [2020-08-21 23:57:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:57:16,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2020-08-21 23:57:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:16,715 INFO L225 Difference]: With dead ends: 3075 [2020-08-21 23:57:16,715 INFO L226 Difference]: Without dead ends: 1585 [2020-08-21 23:57:16,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-08-21 23:57:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-08-21 23:57:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1505. [2020-08-21 23:57:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-08-21 23:57:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1755 transitions. [2020-08-21 23:57:16,843 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1755 transitions. Word has length 177 [2020-08-21 23:57:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:16,844 INFO L479 AbstractCegarLoop]: Abstraction has 1505 states and 1755 transitions. [2020-08-21 23:57:16,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:57:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1755 transitions. [2020-08-21 23:57:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-21 23:57:16,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:16,848 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:16,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:57:16,849 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1006491229, now seen corresponding path program 1 times [2020-08-21 23:57:16,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:16,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295639556] [2020-08-21 23:57:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:16,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 23:57:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-21 23:57:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-21 23:57:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 23:57:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-21 23:57:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-21 23:57:17,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295639556] [2020-08-21 23:57:17,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:17,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:57:17,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303042235] [2020-08-21 23:57:17,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:17,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:17,141 INFO L87 Difference]: Start difference. First operand 1505 states and 1755 transitions. Second operand 10 states. [2020-08-21 23:57:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:18,907 INFO L93 Difference]: Finished difference Result 3514 states and 4187 transitions. [2020-08-21 23:57:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:57:18,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 178 [2020-08-21 23:57:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:18,913 INFO L225 Difference]: With dead ends: 3514 [2020-08-21 23:57:18,913 INFO L226 Difference]: Without dead ends: 1021 [2020-08-21 23:57:18,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-08-21 23:57:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-08-21 23:57:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 985. [2020-08-21 23:57:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-08-21 23:57:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1123 transitions. [2020-08-21 23:57:19,010 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1123 transitions. Word has length 178 [2020-08-21 23:57:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:19,010 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1123 transitions. [2020-08-21 23:57:19,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1123 transitions. [2020-08-21 23:57:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-21 23:57:19,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:19,014 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:19,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:57:19,014 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:19,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2053123678, now seen corresponding path program 1 times [2020-08-21 23:57:19,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:19,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954993275] [2020-08-21 23:57:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 23:57:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 23:57:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 23:57:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 23:57:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-21 23:57:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-08-21 23:57:19,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954993275] [2020-08-21 23:57:19,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:19,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 23:57:19,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900762512] [2020-08-21 23:57:19,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:57:19,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:57:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:57:19,438 INFO L87 Difference]: Start difference. First operand 985 states and 1123 transitions. Second operand 12 states. [2020-08-21 23:57:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:21,652 INFO L93 Difference]: Finished difference Result 1223 states and 1418 transitions. [2020-08-21 23:57:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 23:57:21,653 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 178 [2020-08-21 23:57:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:21,661 INFO L225 Difference]: With dead ends: 1223 [2020-08-21 23:57:21,661 INFO L226 Difference]: Without dead ends: 1220 [2020-08-21 23:57:21,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:57:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-21 23:57:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1172. [2020-08-21 23:57:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-08-21 23:57:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1335 transitions. [2020-08-21 23:57:21,798 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1335 transitions. Word has length 178 [2020-08-21 23:57:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:21,799 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1335 transitions. [2020-08-21 23:57:21,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:57:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1335 transitions. [2020-08-21 23:57:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-08-21 23:57:21,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:21,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:21,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:57:21,803 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 5197958, now seen corresponding path program 1 times [2020-08-21 23:57:21,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:21,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386071792] [2020-08-21 23:57:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 23:57:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:57:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 23:57:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 23:57:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 23:57:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 23:57:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-21 23:57:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-08-21 23:57:22,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386071792] [2020-08-21 23:57:22,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:22,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:57:22,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42683277] [2020-08-21 23:57:22,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:57:22,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:57:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:57:22,042 INFO L87 Difference]: Start difference. First operand 1172 states and 1335 transitions. Second operand 9 states. [2020-08-21 23:57:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:23,418 INFO L93 Difference]: Finished difference Result 2003 states and 2338 transitions. [2020-08-21 23:57:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:57:23,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 182 [2020-08-21 23:57:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:23,427 INFO L225 Difference]: With dead ends: 2003 [2020-08-21 23:57:23,427 INFO L226 Difference]: Without dead ends: 1220 [2020-08-21 23:57:23,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-08-21 23:57:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-21 23:57:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1186. [2020-08-21 23:57:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1186 states. [2020-08-21 23:57:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1353 transitions. [2020-08-21 23:57:23,544 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1353 transitions. Word has length 182 [2020-08-21 23:57:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:23,545 INFO L479 AbstractCegarLoop]: Abstraction has 1186 states and 1353 transitions. [2020-08-21 23:57:23,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:57:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1353 transitions. [2020-08-21 23:57:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-08-21 23:57:23,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:23,549 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:23,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 23:57:23,549 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1390323253, now seen corresponding path program 1 times [2020-08-21 23:57:23,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:23,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412777420] [2020-08-21 23:57:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:57:23,607 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:57:23,607 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:57:23,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 23:57:23,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:57:23 BoogieIcfgContainer [2020-08-21 23:57:23,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:57:23,678 INFO L168 Benchmark]: Toolchain (without parser) took 26841.52 ms. Allocated memory was 140.5 MB in the beginning and 526.4 MB in the end (delta: 385.9 MB). Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 395.2 MB. Max. memory is 7.1 GB. [2020-08-21 23:57:23,679 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 23:57:23,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.06 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.5 MB in the beginning and 179.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:57:23,680 INFO L168 Benchmark]: Boogie Preprocessor took 44.50 ms. Allocated memory is still 203.4 MB. Free memory was 179.6 MB in the beginning and 177.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-21 23:57:23,686 INFO L168 Benchmark]: RCFGBuilder took 600.38 ms. Allocated memory is still 203.4 MB. Free memory was 177.6 MB in the beginning and 144.8 MB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:57:23,693 INFO L168 Benchmark]: TraceAbstraction took 25819.71 ms. Allocated memory was 203.4 MB in the beginning and 526.4 MB in the end (delta: 323.0 MB). Free memory was 144.8 MB in the beginning and 94.4 MB in the end (delta: 50.5 MB). Peak memory consumption was 373.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:57:23,697 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 372.06 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.5 MB in the beginning and 179.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.50 ms. Allocated memory is still 203.4 MB. Free memory was 179.6 MB in the beginning and 177.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 600.38 ms. Allocated memory is still 203.4 MB. Free memory was 177.6 MB in the beginning and 144.8 MB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25819.71 ms. Allocated memory was 203.4 MB in the beginning and 526.4 MB in the end (delta: 323.0 MB). Free memory was 144.8 MB in the beginning and 94.4 MB in the end (delta: 50.5 MB). Peak memory consumption was 373.4 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: [L14] int m_pc = 0; [L15] int t1_pc = 0; [L16] int m_st ; [L17] int t1_st ; [L18] int m_i ; [L19] int t1_i ; [L20] int M_E = 2; [L21] int T1_E = 2; [L22] int E_M = 2; [L23] int E_1 = 2; [L27] int token ; [L29] int local ; [L475] int __retres1 ; [L479] CALL init_model() [L390] m_i = 1 [L391] t1_i = 1 [L479] RET init_model() [L480] CALL start_simulation() [L416] int kernel_st ; [L417] int tmp ; [L418] int tmp___0 ; [L422] kernel_st = 0 [L423] FCALL update_channels() [L424] CALL init_threads() [L172] COND TRUE m_i == 1 [L173] m_st = 0 [L177] COND TRUE t1_i == 1 [L178] t1_st = 0 [L424] RET init_threads() [L425] CALL fire_delta_events() [L261] COND FALSE !(M_E == 0) [L266] COND FALSE !(T1_E == 0) [L271] COND FALSE !(E_M == 0) [L276] COND FALSE !(E_1 == 0) [L425] RET fire_delta_events() [L426] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND FALSE !(m_pc == 1) [L136] __retres1 = 0 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND FALSE !(\read(tmp)) [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND FALSE !(t1_pc == 1) [L155] __retres1 = 0 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND FALSE !(\read(tmp___0)) [L426] RET activate_threads() [L427] CALL reset_delta_events() [L289] COND FALSE !(M_E == 1) [L294] COND FALSE !(T1_E == 1) [L299] COND FALSE !(E_M == 1) [L304] COND FALSE !(E_1 == 1) [L427] RET reset_delta_events() [L430] COND TRUE 1 [L433] kernel_st = 1 [L434] CALL eval() [L208] int tmp ; [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND FALSE !(\read(tmp_ndt_1)) [L236] COND TRUE t1_st == 0 [L237] int tmp_ndt_2; [L238] tmp_ndt_2 = __VERIFIER_nondet_int() [L239] COND TRUE \read(tmp_ndt_2) [L241] t1_st = 1 [L242] CALL transmit1() [L90] COND TRUE t1_pc == 0 [L101] COND TRUE 1 [L103] t1_pc = 1 [L104] t1_st = 2 [L242] RET transmit1() [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND TRUE \read(tmp_ndt_1) [L227] m_st = 1 [L228] CALL master() [L32] int tmp_var = __VERIFIER_nondet_int(); [L34] COND TRUE m_pc == 0 [L45] COND TRUE 1 [L48] token = __VERIFIER_nondet_int() [L49] local = token [L50] E_1 = 1 [L51] CALL immediate_notify() [L343] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND FALSE !(m_pc == 1) [L136] __retres1 = 0 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND FALSE !(\read(tmp)) [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND TRUE t1_pc == 1 [L146] COND TRUE E_1 == 1 [L147] __retres1 = 1 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND TRUE \read(tmp___0) [L330] t1_st = 0 [L343] RET activate_threads() [L51] RET immediate_notify() [L52] E_1 = 2 [L53] m_pc = 1 [L54] m_st = 2 [L228] RET master() [L236] COND TRUE t1_st == 0 [L237] int tmp_ndt_2; [L238] tmp_ndt_2 = __VERIFIER_nondet_int() [L239] COND TRUE \read(tmp_ndt_2) [L241] t1_st = 1 [L242] CALL transmit1() [L90] COND FALSE !(t1_pc == 0) [L93] COND TRUE t1_pc == 1 [L109] token += 1 [L110] E_M = 1 [L111] CALL immediate_notify() [L343] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND TRUE m_pc == 1 [L127] COND TRUE E_M == 1 [L128] __retres1 = 1 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND TRUE \read(tmp) [L322] m_st = 0 [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND TRUE t1_pc == 1 [L146] COND FALSE !(E_1 == 1) [L155] __retres1 = 0 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND FALSE !(\read(tmp___0)) [L343] RET activate_threads() [L111] RET immediate_notify() [L112] E_M = 2 [L101] COND TRUE 1 [L103] t1_pc = 1 [L104] t1_st = 2 [L242] RET transmit1() [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND TRUE \read(tmp_ndt_1) [L227] m_st = 1 [L228] CALL master() [L32] int tmp_var = __VERIFIER_nondet_int(); [L34] COND FALSE !(m_pc == 0) [L37] COND TRUE m_pc == 1 [L59] COND FALSE !(token != local + 1) [L64] COND TRUE tmp_var <= 5 [L65] COND TRUE tmp_var >= 5 [L70] COND TRUE tmp_var <= 5 [L71] COND TRUE tmp_var >= 5 [L72] COND TRUE tmp_var == 5 [L73] CALL error() [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 21 procedures, 151 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.6s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 20.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2071 SDtfs, 7647 SDslu, 593 SDs, 0 SdLazy, 12304 SolverSat, 4250 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 662 GetRequests, 436 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1511occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 1320 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1690 NumberOfCodeBlocks, 1690 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1494 ConstructedInterpolants, 0 QuantifiedInterpolants, 452054 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 474/494 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...