/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:04:43,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:04:43,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:04:43,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:04:43,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:04:43,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:04:43,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:04:43,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:04:43,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:04:43,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:04:43,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:04:43,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:04:43,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:04:43,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:04:43,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:04:43,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:04:43,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:04:43,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:04:43,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:04:43,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:04:43,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:04:43,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:04:43,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:04:43,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:04:43,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:04:43,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:04:43,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:04:43,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:04:43,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:04:43,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:04:43,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:04:43,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:04:43,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:04:43,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:04:43,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:04:43,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:04:43,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:04:43,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:04:43,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:04:43,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:04:43,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:04:43,079 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 15:04:43,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:04:43,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:04:43,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:04:43,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:04:43,103 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:04:43,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:04:43,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:04:43,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:04:43,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:04:43,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:04:43,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:04:43,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:04:43,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:04:43,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:04:43,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:04:43,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:04:43,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:04:43,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:04:43,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:04:43,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:04:43,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:04:43,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:04:43,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:04:43,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:04:43,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:04:43,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:04:43,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:04:43,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:04:43,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:04:43,108 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:04:43,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:04:43,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:04:43,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:04:43,420 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:04:43,421 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:04:43,422 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2020-08-21 15:04:43,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9d354052/15fafcf5f0f24538ba2b3c81365eb31f/FLAGed758e53f [2020-08-21 15:04:43,938 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:04:43,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2020-08-21 15:04:43,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9d354052/15fafcf5f0f24538ba2b3c81365eb31f/FLAGed758e53f [2020-08-21 15:04:44,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9d354052/15fafcf5f0f24538ba2b3c81365eb31f [2020-08-21 15:04:44,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:04:44,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:04:44,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:44,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:04:44,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:04:44,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ebb600b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44, skipping insertion in model container [2020-08-21 15:04:44,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:04:44,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:04:44,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:44,672 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:04:44,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:44,882 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:04:44,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44 WrapperNode [2020-08-21 15:04:44,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:44,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:04:44,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:04:44,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:04:44,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (1/1) ... [2020-08-21 15:04:44,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:04:44,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:04:44,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:04:44,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:04:44,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (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 15:04:45,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:04:45,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:04:45,013 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 15:04:45,013 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-21 15:04:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-21 15:04:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-21 15:04:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-21 15:04:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-21 15:04:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 15:04:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 15:04:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 15:04:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-21 15:04:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-21 15:04:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-21 15:04:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-21 15:04:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-21 15:04:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-21 15:04:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 15:04:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 15:04:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 15:04:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:04:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:04:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 15:04:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-21 15:04:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-21 15:04:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-21 15:04:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:04:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-21 15:04:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-21 15:04:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-21 15:04:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 15:04:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 15:04:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 15:04:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-21 15:04:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-21 15:04:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-21 15:04:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-21 15:04:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-21 15:04:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 15:04:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 15:04:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 15:04:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:04:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:04:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:04:45,529 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:04:45,529 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 15:04:45,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:45 BoogieIcfgContainer [2020-08-21 15:04:45,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:04:45,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:04:45,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:04:45,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:04:45,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:04:44" (1/3) ... [2020-08-21 15:04:45,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df71a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:45, skipping insertion in model container [2020-08-21 15:04:45,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:44" (2/3) ... [2020-08-21 15:04:45,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df71a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:45, skipping insertion in model container [2020-08-21 15:04:45,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:45" (3/3) ... [2020-08-21 15:04:45,551 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-1.c [2020-08-21 15:04:45,559 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:04:45,567 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:04:45,581 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:04:45,607 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:04:45,608 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:04:45,608 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:04:45,608 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:04:45,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:04:45,609 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:04:45,609 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:04:45,609 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:04:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-08-21 15:04:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 15:04:45,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:45,648 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] [2020-08-21 15:04:45,649 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash 205618956, now seen corresponding path program 1 times [2020-08-21 15:04:45,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:45,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241873433] [2020-08-21 15:04:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:46,184 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 15:04:46,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241873433] [2020-08-21 15:04:46,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:46,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:04:46,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117945156] [2020-08-21 15:04:46,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:04:46,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:04:46,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:46,211 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 9 states. [2020-08-21 15:04:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:48,283 INFO L93 Difference]: Finished difference Result 501 states and 755 transitions. [2020-08-21 15:04:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 15:04:48,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-08-21 15:04:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:48,306 INFO L225 Difference]: With dead ends: 501 [2020-08-21 15:04:48,306 INFO L226 Difference]: Without dead ends: 357 [2020-08-21 15:04:48,312 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 15:04:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-21 15:04:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 244. [2020-08-21 15:04:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-21 15:04:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 323 transitions. [2020-08-21 15:04:48,422 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 323 transitions. Word has length 77 [2020-08-21 15:04:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:48,423 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 323 transitions. [2020-08-21 15:04:48,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:04:48,423 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 323 transitions. [2020-08-21 15:04:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 15:04:48,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:48,427 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] [2020-08-21 15:04:48,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:04:48,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:48,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2125445556, now seen corresponding path program 1 times [2020-08-21 15:04:48,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:48,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187789675] [2020-08-21 15:04:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:48,656 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 15:04:48,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187789675] [2020-08-21 15:04:48,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:48,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:48,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599014349] [2020-08-21 15:04:48,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:48,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:48,660 INFO L87 Difference]: Start difference. First operand 244 states and 323 transitions. Second operand 10 states. [2020-08-21 15:04:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:49,793 INFO L93 Difference]: Finished difference Result 573 states and 802 transitions. [2020-08-21 15:04:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:04:49,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 15:04:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:49,806 INFO L225 Difference]: With dead ends: 573 [2020-08-21 15:04:49,806 INFO L226 Difference]: Without dead ends: 348 [2020-08-21 15:04:49,812 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 15:04:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-21 15:04:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2020-08-21 15:04:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-21 15:04:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 316 transitions. [2020-08-21 15:04:49,893 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 316 transitions. Word has length 77 [2020-08-21 15:04:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:49,894 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 316 transitions. [2020-08-21 15:04:49,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 316 transitions. [2020-08-21 15:04:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 15:04:49,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:49,905 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] [2020-08-21 15:04:49,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:04:49,905 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:49,906 INFO L82 PathProgramCache]: Analyzing trace with hash -676620532, now seen corresponding path program 1 times [2020-08-21 15:04:49,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:49,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794933507] [2020-08-21 15:04:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:50,136 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 15:04:50,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794933507] [2020-08-21 15:04:50,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:50,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:50,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186942031] [2020-08-21 15:04:50,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:50,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:50,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:50,139 INFO L87 Difference]: Start difference. First operand 244 states and 316 transitions. Second operand 10 states. [2020-08-21 15:04:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:51,590 INFO L93 Difference]: Finished difference Result 696 states and 1012 transitions. [2020-08-21 15:04:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 15:04:51,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 15:04:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:51,596 INFO L225 Difference]: With dead ends: 696 [2020-08-21 15:04:51,596 INFO L226 Difference]: Without dead ends: 471 [2020-08-21 15:04:51,598 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 15:04:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-08-21 15:04:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 296. [2020-08-21 15:04:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 15:04:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 369 transitions. [2020-08-21 15:04:51,641 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 369 transitions. Word has length 77 [2020-08-21 15:04:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:51,641 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 369 transitions. [2020-08-21 15:04:51,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 369 transitions. [2020-08-21 15:04:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 15:04:51,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:51,643 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] [2020-08-21 15:04:51,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:04:51,644 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:51,644 INFO L82 PathProgramCache]: Analyzing trace with hash 758526605, now seen corresponding path program 1 times [2020-08-21 15:04:51,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:51,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151844105] [2020-08-21 15:04:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:51,843 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 15:04:51,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151844105] [2020-08-21 15:04:51,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:51,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:51,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585740723] [2020-08-21 15:04:51,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:51,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:51,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:51,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:51,846 INFO L87 Difference]: Start difference. First operand 296 states and 369 transitions. Second operand 10 states. [2020-08-21 15:04:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:53,141 INFO L93 Difference]: Finished difference Result 718 states and 955 transitions. [2020-08-21 15:04:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 15:04:53,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 15:04:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:53,149 INFO L225 Difference]: With dead ends: 718 [2020-08-21 15:04:53,149 INFO L226 Difference]: Without dead ends: 442 [2020-08-21 15:04:53,153 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 15:04:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-08-21 15:04:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 316. [2020-08-21 15:04:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-21 15:04:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 389 transitions. [2020-08-21 15:04:53,206 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 389 transitions. Word has length 77 [2020-08-21 15:04:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:53,206 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 389 transitions. [2020-08-21 15:04:53,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 389 transitions. [2020-08-21 15:04:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 15:04:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:53,210 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] [2020-08-21 15:04:53,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:04:53,210 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -613280693, now seen corresponding path program 1 times [2020-08-21 15:04:53,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:53,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814132127] [2020-08-21 15:04:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:53,424 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 15:04:53,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814132127] [2020-08-21 15:04:53,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:53,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:53,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612844596] [2020-08-21 15:04:53,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:53,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:53,426 INFO L87 Difference]: Start difference. First operand 316 states and 389 transitions. Second operand 10 states. [2020-08-21 15:04:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:54,635 INFO L93 Difference]: Finished difference Result 748 states and 981 transitions. [2020-08-21 15:04:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 15:04:54,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 15:04:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:54,642 INFO L225 Difference]: With dead ends: 748 [2020-08-21 15:04:54,642 INFO L226 Difference]: Without dead ends: 452 [2020-08-21 15:04:54,645 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 15:04:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-21 15:04:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 326. [2020-08-21 15:04:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-08-21 15:04:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 397 transitions. [2020-08-21 15:04:54,698 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 397 transitions. Word has length 77 [2020-08-21 15:04:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:54,699 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 397 transitions. [2020-08-21 15:04:54,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 397 transitions. [2020-08-21 15:04:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 15:04:54,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:54,703 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] [2020-08-21 15:04:54,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:04:54,704 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash 88319181, now seen corresponding path program 1 times [2020-08-21 15:04:54,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:54,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725751466] [2020-08-21 15:04:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,933 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 15:04:54,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725751466] [2020-08-21 15:04:54,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:54,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 15:04:54,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420578705] [2020-08-21 15:04:54,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:04:54,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:04:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:54,939 INFO L87 Difference]: Start difference. First operand 326 states and 397 transitions. Second operand 10 states. [2020-08-21 15:04:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:56,422 INFO L93 Difference]: Finished difference Result 894 states and 1170 transitions. [2020-08-21 15:04:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 15:04:56,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 15:04:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:56,431 INFO L225 Difference]: With dead ends: 894 [2020-08-21 15:04:56,432 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 15:04:56,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-08-21 15:04:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 15:04:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 362. [2020-08-21 15:04:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-08-21 15:04:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 422 transitions. [2020-08-21 15:04:56,472 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 422 transitions. Word has length 77 [2020-08-21 15:04:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:56,474 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 422 transitions. [2020-08-21 15:04:56,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:04:56,474 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 422 transitions. [2020-08-21 15:04:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 15:04:56,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:56,476 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] [2020-08-21 15:04:56,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:04:56,476 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:56,477 INFO L82 PathProgramCache]: Analyzing trace with hash 228867791, now seen corresponding path program 1 times [2020-08-21 15:04:56,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:56,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848613915] [2020-08-21 15:04:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:56,652 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 15:04:56,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848613915] [2020-08-21 15:04:56,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:56,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:04:56,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657128573] [2020-08-21 15:04:56,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:04:56,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:04:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:04:56,656 INFO L87 Difference]: Start difference. First operand 362 states and 422 transitions. Second operand 7 states. [2020-08-21 15:04:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:57,884 INFO L93 Difference]: Finished difference Result 1180 states and 1487 transitions. [2020-08-21 15:04:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 15:04:57,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-08-21 15:04:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:57,891 INFO L225 Difference]: With dead ends: 1180 [2020-08-21 15:04:57,892 INFO L226 Difference]: Without dead ends: 838 [2020-08-21 15:04:57,894 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 15:04:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2020-08-21 15:04:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 736. [2020-08-21 15:04:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-08-21 15:04:57,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 896 transitions. [2020-08-21 15:04:57,964 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 896 transitions. Word has length 77 [2020-08-21 15:04:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:57,965 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 896 transitions. [2020-08-21 15:04:57,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:04:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 896 transitions. [2020-08-21 15:04:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 15:04:57,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:57,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:57,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:04:57,968 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:57,969 INFO L82 PathProgramCache]: Analyzing trace with hash -208124888, now seen corresponding path program 1 times [2020-08-21 15:04:57,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:57,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958228602] [2020-08-21 15:04:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:04:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:04:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:04:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:04:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:04:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:04:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:04:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 15:04:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:04:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:04:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:04:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 15:04:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 15:04:58,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958228602] [2020-08-21 15:04:58,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:58,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:04:58,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764956384] [2020-08-21 15:04:58,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:04:58,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:04:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:58,248 INFO L87 Difference]: Start difference. First operand 736 states and 896 transitions. Second operand 9 states. [2020-08-21 15:04:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:59,937 INFO L93 Difference]: Finished difference Result 2077 states and 2719 transitions. [2020-08-21 15:04:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 15:04:59,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-08-21 15:04:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:59,946 INFO L225 Difference]: With dead ends: 2077 [2020-08-21 15:04:59,946 INFO L226 Difference]: Without dead ends: 1361 [2020-08-21 15:04:59,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-08-21 15:04:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-08-21 15:05:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1278. [2020-08-21 15:05:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2020-08-21 15:05:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1535 transitions. [2020-08-21 15:05:00,055 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1535 transitions. Word has length 121 [2020-08-21 15:05:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:00,056 INFO L479 AbstractCegarLoop]: Abstraction has 1278 states and 1535 transitions. [2020-08-21 15:05:00,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:05:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1535 transitions. [2020-08-21 15:05:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 15:05:00,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:00,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:00,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:05:00,060 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash 772889349, now seen corresponding path program 1 times [2020-08-21 15:05:00,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:00,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493581645] [2020-08-21 15:05:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:05:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:05:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:05:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:05:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:05:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 15:05:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 15:05:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-21 15:05:00,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493581645] [2020-08-21 15:05:00,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:00,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:05:00,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097042400] [2020-08-21 15:05:00,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:05:00,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:00,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:05:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:05:00,242 INFO L87 Difference]: Start difference. First operand 1278 states and 1535 transitions. Second operand 9 states. [2020-08-21 15:05:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:01,957 INFO L93 Difference]: Finished difference Result 3315 states and 4133 transitions. [2020-08-21 15:05:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 15:05:01,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-08-21 15:05:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:01,967 INFO L225 Difference]: With dead ends: 3315 [2020-08-21 15:05:01,967 INFO L226 Difference]: Without dead ends: 1560 [2020-08-21 15:05:01,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-21 15:05:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2020-08-21 15:05:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1494. [2020-08-21 15:05:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-08-21 15:05:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1762 transitions. [2020-08-21 15:05:02,090 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1762 transitions. Word has length 121 [2020-08-21 15:05:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:02,091 INFO L479 AbstractCegarLoop]: Abstraction has 1494 states and 1762 transitions. [2020-08-21 15:05:02,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:05:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1762 transitions. [2020-08-21 15:05:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-21 15:05:02,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:02,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:02,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:05:02,098 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:02,099 INFO L82 PathProgramCache]: Analyzing trace with hash 846884099, now seen corresponding path program 1 times [2020-08-21 15:05:02,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:02,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386809607] [2020-08-21 15:05:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:05:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:05:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:05:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:05:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:05:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 15:05:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 15:05:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 15:05:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 15:05:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-21 15:05:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-08-21 15:05:02,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386809607] [2020-08-21 15:05:02,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:05:02,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:05:02,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607453344] [2020-08-21 15:05:02,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:05:02,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:05:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:05:02,346 INFO L87 Difference]: Start difference. First operand 1494 states and 1762 transitions. Second operand 9 states. [2020-08-21 15:05:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:03,807 INFO L93 Difference]: Finished difference Result 3041 states and 3692 transitions. [2020-08-21 15:05:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 15:05:03,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2020-08-21 15:05:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:03,817 INFO L225 Difference]: With dead ends: 3041 [2020-08-21 15:05:03,817 INFO L226 Difference]: Without dead ends: 1568 [2020-08-21 15:05:03,823 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 15:05:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2020-08-21 15:05:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1488. [2020-08-21 15:05:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1488 states. [2020-08-21 15:05:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1728 transitions. [2020-08-21 15:05:03,973 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1728 transitions. Word has length 175 [2020-08-21 15:05:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:03,974 INFO L479 AbstractCegarLoop]: Abstraction has 1488 states and 1728 transitions. [2020-08-21 15:05:03,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:05:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1728 transitions. [2020-08-21 15:05:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-21 15:05:03,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:03,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:03,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:05:03,979 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash -797989467, now seen corresponding path program 1 times [2020-08-21 15:05:03,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:03,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829416681] [2020-08-21 15:05:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:05:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:05:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:05:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:05:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:05:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 15:05:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 15:05:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-21 15:05:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 15:05:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-21 15:05:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-21 15:05:04,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829416681] [2020-08-21 15:05:04,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:05:04,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:05:04,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287028545] [2020-08-21 15:05:04,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:05:04,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:04,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:05:04,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:05:04,200 INFO L87 Difference]: Start difference. First operand 1488 states and 1728 transitions. Second operand 10 states. [2020-08-21 15:05:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:05,862 INFO L93 Difference]: Finished difference Result 3478 states and 4131 transitions. [2020-08-21 15:05:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 15:05:05,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2020-08-21 15:05:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:05,868 INFO L225 Difference]: With dead ends: 3478 [2020-08-21 15:05:05,868 INFO L226 Difference]: Without dead ends: 1006 [2020-08-21 15:05:05,876 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 15:05:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-08-21 15:05:05,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 970. [2020-08-21 15:05:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-08-21 15:05:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1098 transitions. [2020-08-21 15:05:05,951 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1098 transitions. Word has length 176 [2020-08-21 15:05:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:05,952 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1098 transitions. [2020-08-21 15:05:05,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:05:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1098 transitions. [2020-08-21 15:05:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-21 15:05:05,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:05,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:05:05,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:05:05,956 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:05,957 INFO L82 PathProgramCache]: Analyzing trace with hash -421514357, now seen corresponding path program 1 times [2020-08-21 15:05:05,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:05,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468799636] [2020-08-21 15:05:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:05:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:05:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 15:05:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 15:05:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 15:05:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:05:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:05:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 15:05:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 15:05:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 15:05:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 15:05:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 15:05:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:05:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:05:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-21 15:05:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-08-21 15:05:06,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468799636] [2020-08-21 15:05:06,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:05:06,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 15:05:06,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383581849] [2020-08-21 15:05:06,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 15:05:06,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 15:05:06,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:05:06,270 INFO L87 Difference]: Start difference. First operand 970 states and 1098 transitions. Second operand 12 states. [2020-08-21 15:05:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:08,276 INFO L93 Difference]: Finished difference Result 1204 states and 1390 transitions. [2020-08-21 15:05:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 15:05:08,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 176 [2020-08-21 15:05:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:08,279 INFO L225 Difference]: With dead ends: 1204 [2020-08-21 15:05:08,279 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:05:08,285 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 15:05:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:05:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:05:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:05:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:05:08,286 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 176 [2020-08-21 15:05:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:08,286 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:05:08,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 15:05:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:05:08,286 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:05:08,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:05:08,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:05:08,976 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 15:05:09,152 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 15:05:09,332 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 15:05:09,545 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 15:05:09,729 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 15:05:10,786 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 104 [2020-08-21 15:05:19,576 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-08-21 15:05:20,852 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2020-08-21 15:05:21,249 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-08-21 15:05:21,881 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 15:05:22,571 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 15:05:22,731 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-08-21 15:05:23,351 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 15:05:23,990 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 15:05:24,118 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-08-21 15:05:24,761 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 15:05:25,685 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 82 [2020-08-21 15:05:25,848 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-08-21 15:05:26,575 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 79 [2020-08-21 15:05:27,985 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 176 DAG size of output: 61 [2020-08-21 15:05:28,408 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-08-21 15:05:29,394 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 59 [2020-08-21 15:05:30,456 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-08-21 15:05:31,571 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 166 DAG size of output: 83 [2020-08-21 15:05:32,211 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 15:05:32,481 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-08-21 15:05:34,732 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-21 15:05:35,534 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 55 [2020-08-21 15:05:35,850 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-08-21 15:05:38,148 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-21 15:05:38,486 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-08-21 15:05:39,150 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 15:05:41,355 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-21 15:05:41,567 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-08-21 15:05:41,854 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-08-21 15:05:42,776 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-08-21 15:05:43,281 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-08-21 15:05:43,762 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57