/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -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 0.1.25-5644d1e-m [2020-08-18 22:52:35,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:52:35,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:52:35,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:52:35,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:52:35,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:52:35,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:52:35,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:52:35,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:52:35,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:52:35,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:52:35,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:52:35,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:52:35,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:52:35,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:52:35,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:52:35,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:52:35,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:52:35,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:52:35,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:52:35,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:52:35,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:52:35,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:52:35,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:52:35,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:52:35,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:52:35,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:52:35,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:52:35,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:52:35,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:52:35,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:52:35,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:52:35,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:52:35,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:52:35,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:52:35,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:52:35,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:52:35,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:52:35,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:52:35,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:52:35,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:52:35,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:52:35,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:52:35,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:52:35,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:52:35,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:52:35,203 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:52:35,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:52:35,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:52:35,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:52:35,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:52:35,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:52:35,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:52:35,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:52:35,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:52:35,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:52:35,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:52:35,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:52:35,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:52:35,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:52:35,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:52:35,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:52:35,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:52:35,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:52:35,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:52:35,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:52:35,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:52:35,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:52:35,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:52:35,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:52:35,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:52:35,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:52:35,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:52:35,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:52:35,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:52:35,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:52:35,546 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:52:35,548 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2020-08-18 22:52:35,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5f3399cd/881f84723af842e28c718783992ff4a5/FLAGa0b7f9ff0 [2020-08-18 22:52:36,125 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:52:36,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2020-08-18 22:52:36,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5f3399cd/881f84723af842e28c718783992ff4a5/FLAGa0b7f9ff0 [2020-08-18 22:52:36,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5f3399cd/881f84723af842e28c718783992ff4a5 [2020-08-18 22:52:36,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:52:36,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:52:36,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:52:36,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:52:36,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:52:36,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4241192c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36, skipping insertion in model container [2020-08-18 22:52:36,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:52:36,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:52:36,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:52:36,746 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:52:36,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:52:36,925 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:52:36,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36 WrapperNode [2020-08-18 22:52:36,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:52:36,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:52:36,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:52:36,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:52:36,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... [2020-08-18 22:52:36,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:52:36,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:52:36,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:52:36,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:52:36,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:52:37,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:52:37,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:52:37,050 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 22:52:37,050 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-18 22:52:37,050 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-18 22:52:37,050 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-18 22:52:37,050 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-18 22:52:37,051 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-18 22:52:37,051 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 22:52:37,051 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 22:52:37,051 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 22:52:37,051 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-18 22:52:37,051 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-18 22:52:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-18 22:52:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-18 22:52:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-18 22:52:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-18 22:52:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 22:52:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 22:52:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 22:52:37,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:52:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:52:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 22:52:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-18 22:52:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-18 22:52:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-18 22:52:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:52:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-18 22:52:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-18 22:52:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-18 22:52:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 22:52:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 22:52:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 22:52:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-18 22:52:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-18 22:52:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-18 22:52:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-18 22:52:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-18 22:52:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 22:52:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 22:52:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 22:52:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:52:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:52:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:52:37,553 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:52:37,553 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 22:52:37,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:52:37 BoogieIcfgContainer [2020-08-18 22:52:37,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:52:37,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:52:37,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:52:37,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:52:37,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:52:36" (1/3) ... [2020-08-18 22:52:37,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b0f86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:52:37, skipping insertion in model container [2020-08-18 22:52:37,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:52:36" (2/3) ... [2020-08-18 22:52:37,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b0f86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:52:37, skipping insertion in model container [2020-08-18 22:52:37,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:52:37" (3/3) ... [2020-08-18 22:52:37,568 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-1.c [2020-08-18 22:52:37,577 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:52:37,584 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:52:37,594 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:52:37,618 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:52:37,618 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:52:37,618 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:52:37,618 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:52:37,619 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:52:37,619 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:52:37,619 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:52:37,619 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:52:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-08-18 22:52:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:52:37,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:37,653 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] [2020-08-18 22:52:37,654 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash 205618956, now seen corresponding path program 1 times [2020-08-18 22:52:37,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:37,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935177310] [2020-08-18 22:52:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:37,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:38,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935177310] [2020-08-18 22:52:38,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:38,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 22:52:38,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312756002] [2020-08-18 22:52:38,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:52:38,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:52:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:52:38,249 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 9 states. [2020-08-18 22:52:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:40,386 INFO L93 Difference]: Finished difference Result 501 states and 755 transitions. [2020-08-18 22:52:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:52:40,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-08-18 22:52:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:40,409 INFO L225 Difference]: With dead ends: 501 [2020-08-18 22:52:40,409 INFO L226 Difference]: Without dead ends: 357 [2020-08-18 22:52:40,420 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 [2020-08-18 22:52:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-18 22:52:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 244. [2020-08-18 22:52:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-18 22:52:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 323 transitions. [2020-08-18 22:52:40,517 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 323 transitions. Word has length 77 [2020-08-18 22:52:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:40,517 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 323 transitions. [2020-08-18 22:52:40,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:52:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 323 transitions. [2020-08-18 22:52:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:52:40,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:40,522 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] [2020-08-18 22:52:40,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:52:40,522 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2125445556, now seen corresponding path program 1 times [2020-08-18 22:52:40,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:40,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381410054] [2020-08-18 22:52:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:40,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381410054] [2020-08-18 22:52:40,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:40,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 22:52:40,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334710092] [2020-08-18 22:52:40,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:52:40,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:52:40,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:52:40,743 INFO L87 Difference]: Start difference. First operand 244 states and 323 transitions. Second operand 10 states. [2020-08-18 22:52:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:41,936 INFO L93 Difference]: Finished difference Result 573 states and 802 transitions. [2020-08-18 22:52:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:52:41,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-18 22:52:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:41,942 INFO L225 Difference]: With dead ends: 573 [2020-08-18 22:52:41,942 INFO L226 Difference]: Without dead ends: 348 [2020-08-18 22:52:41,945 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 [2020-08-18 22:52:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-18 22:52:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2020-08-18 22:52:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-18 22:52:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 316 transitions. [2020-08-18 22:52:41,997 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 316 transitions. Word has length 77 [2020-08-18 22:52:41,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:41,998 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 316 transitions. [2020-08-18 22:52:41,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:52:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 316 transitions. [2020-08-18 22:52:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:52:42,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:42,003 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] [2020-08-18 22:52:42,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:52:42,004 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash -676620532, now seen corresponding path program 1 times [2020-08-18 22:52:42,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:42,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077743354] [2020-08-18 22:52:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:42,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077743354] [2020-08-18 22:52:42,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:42,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 22:52:42,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090808385] [2020-08-18 22:52:42,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:52:42,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:42,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:52:42,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:52:42,193 INFO L87 Difference]: Start difference. First operand 244 states and 316 transitions. Second operand 10 states. [2020-08-18 22:52:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:43,693 INFO L93 Difference]: Finished difference Result 696 states and 1012 transitions. [2020-08-18 22:52:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:52:43,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-18 22:52:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:43,700 INFO L225 Difference]: With dead ends: 696 [2020-08-18 22:52:43,702 INFO L226 Difference]: Without dead ends: 471 [2020-08-18 22:52:43,704 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 [2020-08-18 22:52:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-08-18 22:52:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 296. [2020-08-18 22:52:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-18 22:52:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 369 transitions. [2020-08-18 22:52:43,777 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 369 transitions. Word has length 77 [2020-08-18 22:52:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:43,777 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 369 transitions. [2020-08-18 22:52:43,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:52:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 369 transitions. [2020-08-18 22:52:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:52:43,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:43,779 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] [2020-08-18 22:52:43,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:52:43,780 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:43,780 INFO L82 PathProgramCache]: Analyzing trace with hash 758526605, now seen corresponding path program 1 times [2020-08-18 22:52:43,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:43,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919456318] [2020-08-18 22:52:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:43,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919456318] [2020-08-18 22:52:43,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:43,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 22:52:43,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390821803] [2020-08-18 22:52:43,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:52:43,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:52:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:52:43,945 INFO L87 Difference]: Start difference. First operand 296 states and 369 transitions. Second operand 10 states. [2020-08-18 22:52:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:45,349 INFO L93 Difference]: Finished difference Result 718 states and 955 transitions. [2020-08-18 22:52:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:52:45,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-18 22:52:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:45,357 INFO L225 Difference]: With dead ends: 718 [2020-08-18 22:52:45,357 INFO L226 Difference]: Without dead ends: 442 [2020-08-18 22:52:45,359 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 [2020-08-18 22:52:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-08-18 22:52:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 316. [2020-08-18 22:52:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-18 22:52:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 389 transitions. [2020-08-18 22:52:45,405 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 389 transitions. Word has length 77 [2020-08-18 22:52:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:45,405 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 389 transitions. [2020-08-18 22:52:45,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:52:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 389 transitions. [2020-08-18 22:52:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:52:45,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:45,414 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] [2020-08-18 22:52:45,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:52:45,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:45,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash -613280693, now seen corresponding path program 1 times [2020-08-18 22:52:45,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:45,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178384205] [2020-08-18 22:52:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:45,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178384205] [2020-08-18 22:52:45,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:45,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 22:52:45,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214055104] [2020-08-18 22:52:45,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:52:45,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:52:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:52:45,626 INFO L87 Difference]: Start difference. First operand 316 states and 389 transitions. Second operand 10 states. [2020-08-18 22:52:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:46,889 INFO L93 Difference]: Finished difference Result 748 states and 981 transitions. [2020-08-18 22:52:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 22:52:46,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-18 22:52:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:46,896 INFO L225 Difference]: With dead ends: 748 [2020-08-18 22:52:46,896 INFO L226 Difference]: Without dead ends: 452 [2020-08-18 22:52:46,898 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 [2020-08-18 22:52:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-18 22:52:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 326. [2020-08-18 22:52:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-08-18 22:52:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 397 transitions. [2020-08-18 22:52:46,944 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 397 transitions. Word has length 77 [2020-08-18 22:52:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:46,945 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 397 transitions. [2020-08-18 22:52:46,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:52:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 397 transitions. [2020-08-18 22:52:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:52:46,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:46,948 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] [2020-08-18 22:52:46,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:52:46,948 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash 88319181, now seen corresponding path program 1 times [2020-08-18 22:52:46,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:46,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934258865] [2020-08-18 22:52:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:47,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934258865] [2020-08-18 22:52:47,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:47,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 22:52:47,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893173326] [2020-08-18 22:52:47,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:52:47,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:52:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:52:47,145 INFO L87 Difference]: Start difference. First operand 326 states and 397 transitions. Second operand 10 states. [2020-08-18 22:52:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:48,625 INFO L93 Difference]: Finished difference Result 894 states and 1170 transitions. [2020-08-18 22:52:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:52:48,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-18 22:52:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:48,632 INFO L225 Difference]: With dead ends: 894 [2020-08-18 22:52:48,632 INFO L226 Difference]: Without dead ends: 587 [2020-08-18 22:52:48,634 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 [2020-08-18 22:52:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-18 22:52:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 362. [2020-08-18 22:52:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-08-18 22:52:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 422 transitions. [2020-08-18 22:52:48,674 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 422 transitions. Word has length 77 [2020-08-18 22:52:48,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:48,675 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 422 transitions. [2020-08-18 22:52:48,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:52:48,675 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 422 transitions. [2020-08-18 22:52:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:52:48,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:48,676 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] [2020-08-18 22:52:48,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:52:48,677 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash 228867791, now seen corresponding path program 1 times [2020-08-18 22:52:48,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:48,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453518065] [2020-08-18 22:52:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:48,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453518065] [2020-08-18 22:52:48,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:48,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 22:52:48,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4717158] [2020-08-18 22:52:48,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:52:48,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:48,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:52:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:52:48,827 INFO L87 Difference]: Start difference. First operand 362 states and 422 transitions. Second operand 7 states. [2020-08-18 22:52:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:50,050 INFO L93 Difference]: Finished difference Result 1180 states and 1487 transitions. [2020-08-18 22:52:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:52:50,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-08-18 22:52:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:50,058 INFO L225 Difference]: With dead ends: 1180 [2020-08-18 22:52:50,058 INFO L226 Difference]: Without dead ends: 838 [2020-08-18 22:52:50,061 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 [2020-08-18 22:52:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2020-08-18 22:52:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 736. [2020-08-18 22:52:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-08-18 22:52:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 896 transitions. [2020-08-18 22:52:50,163 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 896 transitions. Word has length 77 [2020-08-18 22:52:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:50,165 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 896 transitions. [2020-08-18 22:52:50,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:52:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 896 transitions. [2020-08-18 22:52:50,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 22:52:50,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:50,168 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] [2020-08-18 22:52:50,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:52:50,168 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash -208124888, now seen corresponding path program 1 times [2020-08-18 22:52:50,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:50,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983327416] [2020-08-18 22:52:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:52:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:52:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:52:50,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983327416] [2020-08-18 22:52:50,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:50,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:52:50,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652254107] [2020-08-18 22:52:50,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:52:50,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:52:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:52:50,451 INFO L87 Difference]: Start difference. First operand 736 states and 896 transitions. Second operand 9 states. [2020-08-18 22:52:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:52,280 INFO L93 Difference]: Finished difference Result 2077 states and 2719 transitions. [2020-08-18 22:52:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:52:52,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-08-18 22:52:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:52,291 INFO L225 Difference]: With dead ends: 2077 [2020-08-18 22:52:52,291 INFO L226 Difference]: Without dead ends: 1361 [2020-08-18 22:52:52,296 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 [2020-08-18 22:52:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-08-18 22:52:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1278. [2020-08-18 22:52:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2020-08-18 22:52:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1535 transitions. [2020-08-18 22:52:52,438 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1535 transitions. Word has length 121 [2020-08-18 22:52:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:52,438 INFO L479 AbstractCegarLoop]: Abstraction has 1278 states and 1535 transitions. [2020-08-18 22:52:52,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:52:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1535 transitions. [2020-08-18 22:52:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 22:52:52,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:52,442 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] [2020-08-18 22:52:52,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:52:52,443 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash 772889349, now seen corresponding path program 1 times [2020-08-18 22:52:52,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:52,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555301181] [2020-08-18 22:52:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:52:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:52:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-18 22:52:52,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555301181] [2020-08-18 22:52:52,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:52:52,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 22:52:52,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578477857] [2020-08-18 22:52:52,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:52:52,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:52:52,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:52:52,643 INFO L87 Difference]: Start difference. First operand 1278 states and 1535 transitions. Second operand 9 states. [2020-08-18 22:52:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:54,381 INFO L93 Difference]: Finished difference Result 3315 states and 4133 transitions. [2020-08-18 22:52:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:52:54,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-08-18 22:52:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:54,390 INFO L225 Difference]: With dead ends: 3315 [2020-08-18 22:52:54,390 INFO L226 Difference]: Without dead ends: 1560 [2020-08-18 22:52:54,397 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 [2020-08-18 22:52:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2020-08-18 22:52:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1494. [2020-08-18 22:52:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-08-18 22:52:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1762 transitions. [2020-08-18 22:52:54,520 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1762 transitions. Word has length 121 [2020-08-18 22:52:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:54,522 INFO L479 AbstractCegarLoop]: Abstraction has 1494 states and 1762 transitions. [2020-08-18 22:52:54,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:52:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1762 transitions. [2020-08-18 22:52:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-18 22:52:54,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:54,528 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] [2020-08-18 22:52:54,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:52:54,528 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash 846884099, now seen corresponding path program 1 times [2020-08-18 22:52:54,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:54,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620474089] [2020-08-18 22:52:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 22:52:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:52:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:52:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 22:52:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-18 22:52:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-08-18 22:52:54,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620474089] [2020-08-18 22:52:54,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:54,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:52:54,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972333315] [2020-08-18 22:52:54,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:52:54,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:52:54,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:52:54,792 INFO L87 Difference]: Start difference. First operand 1494 states and 1762 transitions. Second operand 9 states. [2020-08-18 22:52:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:56,250 INFO L93 Difference]: Finished difference Result 3041 states and 3692 transitions. [2020-08-18 22:52:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:52:56,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2020-08-18 22:52:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:56,263 INFO L225 Difference]: With dead ends: 3041 [2020-08-18 22:52:56,263 INFO L226 Difference]: Without dead ends: 1568 [2020-08-18 22:52:56,269 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 [2020-08-18 22:52:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2020-08-18 22:52:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1488. [2020-08-18 22:52:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1488 states. [2020-08-18 22:52:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1728 transitions. [2020-08-18 22:52:56,399 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1728 transitions. Word has length 175 [2020-08-18 22:52:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:56,399 INFO L479 AbstractCegarLoop]: Abstraction has 1488 states and 1728 transitions. [2020-08-18 22:52:56,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:52:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1728 transitions. [2020-08-18 22:52:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-18 22:52:56,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:56,405 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] [2020-08-18 22:52:56,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:52:56,405 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:56,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:56,405 INFO L82 PathProgramCache]: Analyzing trace with hash -797989467, now seen corresponding path program 1 times [2020-08-18 22:52:56,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:56,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182331023] [2020-08-18 22:52:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:52:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:52:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-18 22:52:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 22:52:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 22:52:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-18 22:52:56,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182331023] [2020-08-18 22:52:56,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:56,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:52:56,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724883820] [2020-08-18 22:52:56,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:52:56,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:52:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:52:56,757 INFO L87 Difference]: Start difference. First operand 1488 states and 1728 transitions. Second operand 10 states. [2020-08-18 22:52:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:58,435 INFO L93 Difference]: Finished difference Result 3478 states and 4131 transitions. [2020-08-18 22:52:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:52:58,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2020-08-18 22:52:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:58,441 INFO L225 Difference]: With dead ends: 3478 [2020-08-18 22:52:58,441 INFO L226 Difference]: Without dead ends: 1006 [2020-08-18 22:52:58,448 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 [2020-08-18 22:52:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-08-18 22:52:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 970. [2020-08-18 22:52:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-08-18 22:52:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1098 transitions. [2020-08-18 22:52:58,525 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1098 transitions. Word has length 176 [2020-08-18 22:52:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:58,525 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1098 transitions. [2020-08-18 22:52:58,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:52:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1098 transitions. [2020-08-18 22:52:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-18 22:52:58,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:58,528 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] [2020-08-18 22:52:58,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:52:58,529 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash -421514357, now seen corresponding path program 1 times [2020-08-18 22:52:58,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:58,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245936353] [2020-08-18 22:52:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:52:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:52:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:52:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 22:52:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:52:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:52:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:52:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:52:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 22:52:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 22:52:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 22:52:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:52:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:52:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:52:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 22:52:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-08-18 22:52:58,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245936353] [2020-08-18 22:52:58,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:58,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:52:58,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134121600] [2020-08-18 22:52:58,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:52:58,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:58,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:52:58,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:52:58,837 INFO L87 Difference]: Start difference. First operand 970 states and 1098 transitions. Second operand 12 states. [2020-08-18 22:53:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:53:01,210 INFO L93 Difference]: Finished difference Result 1204 states and 1390 transitions. [2020-08-18 22:53:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:53:01,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 176 [2020-08-18 22:53:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:53:01,212 INFO L225 Difference]: With dead ends: 1204 [2020-08-18 22:53:01,212 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:53:01,216 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 [2020-08-18 22:53:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:53:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:53:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:53:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:53:01,217 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 176 [2020-08-18 22:53:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:53:01,218 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:53:01,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:53:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:53:01,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:53:01,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:53:01,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:53:01,963 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-18 22:53:02,226 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-18 22:53:02,463 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-18 22:53:02,643 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-18 22:53:02,820 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-18 22:53:04,035 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 104 [2020-08-18 22:53:12,916 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-08-18 22:53:14,220 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2020-08-18 22:53:14,623 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-08-18 22:53:15,246 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-18 22:53:15,898 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-18 22:53:16,058 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-08-18 22:53:16,702 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-18 22:53:17,305 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-18 22:53:17,434 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-08-18 22:53:18,057 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-18 22:53:18,973 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 82 [2020-08-18 22:53:19,824 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 79 [2020-08-18 22:53:21,282 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 176 DAG size of output: 61 [2020-08-18 22:53:21,709 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-08-18 22:53:22,642 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 59 [2020-08-18 22:53:23,659 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-08-18 22:53:24,770 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 166 DAG size of output: 83 [2020-08-18 22:53:25,429 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-18 22:53:25,705 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-08-18 22:53:27,937 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-18 22:53:28,767 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 55 [2020-08-18 22:53:29,086 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-08-18 22:53:31,293 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-18 22:53:31,640 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-08-18 22:53:32,309 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-18 22:53:34,520 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-18 22:53:34,630 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-08-18 22:53:34,742 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-08-18 22:53:35,033 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49