/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:50:47,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:50:47,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:50:47,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:50:47,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:50:47,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:50:47,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:50:47,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:50:47,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:50:47,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:50:47,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:50:47,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:50:47,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:50:47,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:50:47,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:50:47,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:50:47,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:50:47,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:50:47,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:50:47,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:50:47,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:50:47,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:50:47,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:50:47,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:50:47,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:50:47,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:50:47,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:50:47,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:50:47,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:50:47,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:50:47,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:50:47,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:50:47,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:50:47,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:50:47,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:50:47,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:50:47,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:50:47,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:50:47,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:50:47,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:50:47,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:50:47,130 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 18:50:47,165 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:50:47,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:50:47,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:50:47,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:50:47,167 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:50:47,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:50:47,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:50:47,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:50:47,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:50:47,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:50:47,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:50:47,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:50:47,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:50:47,168 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:50:47,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:50:47,169 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:50:47,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:50:47,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:50:47,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:50:47,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:50:47,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:50:47,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:50:47,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:50:47,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:50:47,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:50:47,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:50:47,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:50:47,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:50:47,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:50:47,172 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:50:47,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:50:47,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:50:47,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:50:47,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:50:47,516 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:50:47,517 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-18 18:50:47,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1aeb7719b/2d92077b7e204f8c81b868ce3d09724b/FLAGa944d4cb4 [2020-08-18 18:50:48,047 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:50:48,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-18 18:50:48,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1aeb7719b/2d92077b7e204f8c81b868ce3d09724b/FLAGa944d4cb4 [2020-08-18 18:50:48,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1aeb7719b/2d92077b7e204f8c81b868ce3d09724b [2020-08-18 18:50:48,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:50:48,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:50:48,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:50:48,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:50:48,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:50:48,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d78f5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48, skipping insertion in model container [2020-08-18 18:50:48,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:50:48,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:50:48,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:50:48,758 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:50:48,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:50:48,913 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:50:48,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48 WrapperNode [2020-08-18 18:50:48,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:50:48,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:50:48,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:50:48,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:50:48,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (1/1) ... [2020-08-18 18:50:48,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:50:48,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:50:48,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:50:48,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:50:48,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (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 18:50:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:50:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:50:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 18:50:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-18 18:50:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-18 18:50:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-08-18 18:50:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-18 18:50:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-18 18:50:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-08-18 18:50:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-18 18:50:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 18:50:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 18:50:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 18:50:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-18 18:50:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-18 18:50:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-18 18:50:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-18 18:50:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-18 18:50:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-18 18:50:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 18:50:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 18:50:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 18:50:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:50:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:50:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 18:50:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-18 18:50:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-18 18:50:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-08-18 18:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-18 18:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-18 18:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-18 18:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-08-18 18:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-18 18:50:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 18:50:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 18:50:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 18:50:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-18 18:50:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-18 18:50:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-18 18:50:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-18 18:50:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-18 18:50:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 18:50:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 18:50:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 18:50:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:50:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:50:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:50:49,615 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:50:49,616 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 18:50:49,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:50:49 BoogieIcfgContainer [2020-08-18 18:50:49,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:50:49,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:50:49,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:50:49,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:50:49,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:50:48" (1/3) ... [2020-08-18 18:50:49,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b1660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:50:49, skipping insertion in model container [2020-08-18 18:50:49,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:48" (2/3) ... [2020-08-18 18:50:49,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b1660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:50:49, skipping insertion in model container [2020-08-18 18:50:49,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:50:49" (3/3) ... [2020-08-18 18:50:49,631 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2020-08-18 18:50:49,642 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:50:49,650 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:50:49,663 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:50:49,687 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:50:49,687 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:50:49,687 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:50:49,688 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:50:49,688 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:50:49,688 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:50:49,688 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:50:49,688 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:50:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-08-18 18:50:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:50:49,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:49,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:49,724 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash -67309704, now seen corresponding path program 1 times [2020-08-18 18:50:49,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:49,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821343183] [2020-08-18 18:50:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:50:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:50:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:50:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:50:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:50:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:50:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:50:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:50:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:50:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:50:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:50,429 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 18:50:50,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821343183] [2020-08-18 18:50:50,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:50,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 18:50:50,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336904119] [2020-08-18 18:50:50,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:50:50,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:50:50,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:50:50,459 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 14 states. [2020-08-18 18:50:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:53,443 INFO L93 Difference]: Finished difference Result 449 states and 710 transitions. [2020-08-18 18:50:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 18:50:53,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-08-18 18:50:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:53,472 INFO L225 Difference]: With dead ends: 449 [2020-08-18 18:50:53,472 INFO L226 Difference]: Without dead ends: 276 [2020-08-18 18:50:53,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:50:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-08-18 18:50:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-08-18 18:50:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 18:50:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2020-08-18 18:50:53,567 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 92 [2020-08-18 18:50:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:53,568 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2020-08-18 18:50:53,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:50:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2020-08-18 18:50:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:50:53,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:53,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:53,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:50:53,574 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2098275908, now seen corresponding path program 1 times [2020-08-18 18:50:53,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:53,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313040242] [2020-08-18 18:50:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:50:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:50:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:50:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:50:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:50:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:50:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:50:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:50:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:50:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:50:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:53,838 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 18:50:53,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313040242] [2020-08-18 18:50:53,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:53,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:50:53,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013059517] [2020-08-18 18:50:53,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:50:53,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:53,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:50:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:50:53,842 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand 10 states. [2020-08-18 18:50:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:55,344 INFO L93 Difference]: Finished difference Result 425 states and 610 transitions. [2020-08-18 18:50:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:50:55,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:50:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:55,356 INFO L225 Difference]: With dead ends: 425 [2020-08-18 18:50:55,356 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 18:50:55,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:50:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 18:50:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2020-08-18 18:50:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 18:50:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 234 transitions. [2020-08-18 18:50:55,436 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 234 transitions. Word has length 92 [2020-08-18 18:50:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:55,437 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 234 transitions. [2020-08-18 18:50:55,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:50:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 234 transitions. [2020-08-18 18:50:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:50:55,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:55,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:55,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:50:55,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1653808840, now seen corresponding path program 1 times [2020-08-18 18:50:55,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:55,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932954404] [2020-08-18 18:50:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:50:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:50:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:50:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:50:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:50:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:50:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:50:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:50:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:50:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:50:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:55,702 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 18:50:55,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932954404] [2020-08-18 18:50:55,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:55,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:50:55,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420178644] [2020-08-18 18:50:55,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:50:55,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:50:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:50:55,705 INFO L87 Difference]: Start difference. First operand 177 states and 234 transitions. Second operand 10 states. [2020-08-18 18:50:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:57,734 INFO L93 Difference]: Finished difference Result 504 states and 747 transitions. [2020-08-18 18:50:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:50:57,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:50:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:57,739 INFO L225 Difference]: With dead ends: 504 [2020-08-18 18:50:57,739 INFO L226 Difference]: Without dead ends: 347 [2020-08-18 18:50:57,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:50:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-08-18 18:50:57,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 213. [2020-08-18 18:50:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-18 18:50:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2020-08-18 18:50:57,778 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 92 [2020-08-18 18:50:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:57,778 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2020-08-18 18:50:57,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:50:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2020-08-18 18:50:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:50:57,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:57,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:57,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:50:57,781 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash -550041895, now seen corresponding path program 1 times [2020-08-18 18:50:57,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:57,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354441406] [2020-08-18 18:50:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:50:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:50:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:50:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:50:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:50:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:50:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:50:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:50:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:50:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:50:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:58,008 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 18:50:58,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354441406] [2020-08-18 18:50:58,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:58,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:50:58,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774058212] [2020-08-18 18:50:58,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:50:58,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:58,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:50:58,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:50:58,011 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand 10 states. [2020-08-18 18:51:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:00,006 INFO L93 Difference]: Finished difference Result 586 states and 840 transitions. [2020-08-18 18:51:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:51:00,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:51:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:00,016 INFO L225 Difference]: With dead ends: 586 [2020-08-18 18:51:00,016 INFO L226 Difference]: Without dead ends: 393 [2020-08-18 18:51:00,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:51:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-18 18:51:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 249. [2020-08-18 18:51:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-18 18:51:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 312 transitions. [2020-08-18 18:51:00,089 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 312 transitions. Word has length 92 [2020-08-18 18:51:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:00,090 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 312 transitions. [2020-08-18 18:51:00,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:51:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 312 transitions. [2020-08-18 18:51:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:51:00,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:00,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:00,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:51:00,094 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1219969707, now seen corresponding path program 1 times [2020-08-18 18:51:00,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:00,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670925162] [2020-08-18 18:51:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:00,305 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 18:51:00,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670925162] [2020-08-18 18:51:00,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:00,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:51:00,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445780323] [2020-08-18 18:51:00,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:51:00,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:51:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:51:00,309 INFO L87 Difference]: Start difference. First operand 249 states and 312 transitions. Second operand 10 states. [2020-08-18 18:51:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:02,234 INFO L93 Difference]: Finished difference Result 663 states and 922 transitions. [2020-08-18 18:51:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:51:02,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:51:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:02,240 INFO L225 Difference]: With dead ends: 663 [2020-08-18 18:51:02,240 INFO L226 Difference]: Without dead ends: 434 [2020-08-18 18:51:02,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:51:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-08-18 18:51:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 282. [2020-08-18 18:51:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-18 18:51:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2020-08-18 18:51:02,275 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 92 [2020-08-18 18:51:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:02,276 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2020-08-18 18:51:02,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:51:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2020-08-18 18:51:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:51:02,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:02,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:02,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:51:02,278 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1929357560, now seen corresponding path program 1 times [2020-08-18 18:51:02,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:02,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919419034] [2020-08-18 18:51:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:02,519 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 18:51:02,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919419034] [2020-08-18 18:51:02,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:02,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:51:02,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810221892] [2020-08-18 18:51:02,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:51:02,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:51:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:51:02,523 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand 10 states. [2020-08-18 18:51:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:04,314 INFO L93 Difference]: Finished difference Result 674 states and 877 transitions. [2020-08-18 18:51:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 18:51:04,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:51:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:04,320 INFO L225 Difference]: With dead ends: 674 [2020-08-18 18:51:04,320 INFO L226 Difference]: Without dead ends: 413 [2020-08-18 18:51:04,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:51:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-18 18:51:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 287. [2020-08-18 18:51:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-08-18 18:51:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 347 transitions. [2020-08-18 18:51:04,354 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 347 transitions. Word has length 92 [2020-08-18 18:51:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:04,355 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 347 transitions. [2020-08-18 18:51:04,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:51:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 347 transitions. [2020-08-18 18:51:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:51:04,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:04,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:04,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:51:04,358 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:04,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1031964282, now seen corresponding path program 1 times [2020-08-18 18:51:04,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:04,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592781175] [2020-08-18 18:51:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:04,553 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 18:51:04,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592781175] [2020-08-18 18:51:04,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:04,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:51:04,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751090822] [2020-08-18 18:51:04,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:51:04,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:04,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:51:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:51:04,556 INFO L87 Difference]: Start difference. First operand 287 states and 347 transitions. Second operand 10 states. [2020-08-18 18:51:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:07,067 INFO L93 Difference]: Finished difference Result 1068 states and 1350 transitions. [2020-08-18 18:51:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 18:51:07,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:51:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:07,076 INFO L225 Difference]: With dead ends: 1068 [2020-08-18 18:51:07,076 INFO L226 Difference]: Without dead ends: 801 [2020-08-18 18:51:07,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:51:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2020-08-18 18:51:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 591. [2020-08-18 18:51:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-18 18:51:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 707 transitions. [2020-08-18 18:51:07,211 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 707 transitions. Word has length 92 [2020-08-18 18:51:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:07,211 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 707 transitions. [2020-08-18 18:51:07,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:51:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 707 transitions. [2020-08-18 18:51:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:51:07,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:07,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:07,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:51:07,215 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1054596536, now seen corresponding path program 1 times [2020-08-18 18:51:07,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:07,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018150612] [2020-08-18 18:51:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:07,430 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 18:51:07,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018150612] [2020-08-18 18:51:07,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:07,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:51:07,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799394271] [2020-08-18 18:51:07,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:51:07,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:07,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:51:07,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:51:07,433 INFO L87 Difference]: Start difference. First operand 591 states and 707 transitions. Second operand 7 states. [2020-08-18 18:51:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:09,264 INFO L93 Difference]: Finished difference Result 2051 states and 2640 transitions. [2020-08-18 18:51:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:51:09,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-08-18 18:51:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:09,278 INFO L225 Difference]: With dead ends: 2051 [2020-08-18 18:51:09,278 INFO L226 Difference]: Without dead ends: 1481 [2020-08-18 18:51:09,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:51:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-08-18 18:51:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1207. [2020-08-18 18:51:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-08-18 18:51:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1495 transitions. [2020-08-18 18:51:09,412 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1495 transitions. Word has length 92 [2020-08-18 18:51:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:09,413 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1495 transitions. [2020-08-18 18:51:09,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:51:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1495 transitions. [2020-08-18 18:51:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 18:51:09,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:09,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:51:09,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:51:09,418 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:09,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1357284192, now seen corresponding path program 1 times [2020-08-18 18:51:09,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:09,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503236936] [2020-08-18 18:51:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:51:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-18 18:51:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 18:51:09,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503236936] [2020-08-18 18:51:09,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:09,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 18:51:09,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035915537] [2020-08-18 18:51:09,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:51:09,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:09,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:51:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:51:09,691 INFO L87 Difference]: Start difference. First operand 1207 states and 1495 transitions. Second operand 9 states. [2020-08-18 18:51:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:12,515 INFO L93 Difference]: Finished difference Result 3860 states and 4987 transitions. [2020-08-18 18:51:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 18:51:12,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2020-08-18 18:51:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:12,534 INFO L225 Difference]: With dead ends: 3860 [2020-08-18 18:51:12,534 INFO L226 Difference]: Without dead ends: 2675 [2020-08-18 18:51:12,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-18 18:51:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-08-18 18:51:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2303. [2020-08-18 18:51:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-18 18:51:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2940 transitions. [2020-08-18 18:51:12,786 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2940 transitions. Word has length 147 [2020-08-18 18:51:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:12,787 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2940 transitions. [2020-08-18 18:51:12,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:51:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2940 transitions. [2020-08-18 18:51:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-08-18 18:51:12,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:12,794 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:12,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:51:12,795 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash 674078602, now seen corresponding path program 1 times [2020-08-18 18:51:12,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:12,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634612592] [2020-08-18 18:51:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:12,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:51:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-18 18:51:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 18:51:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-08-18 18:51:13,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634612592] [2020-08-18 18:51:13,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:13,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:51:13,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835461712] [2020-08-18 18:51:13,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:51:13,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:13,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:51:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:51:13,159 INFO L87 Difference]: Start difference. First operand 2303 states and 2940 transitions. Second operand 10 states. [2020-08-18 18:51:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:16,426 INFO L93 Difference]: Finished difference Result 6901 states and 9607 transitions. [2020-08-18 18:51:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:51:16,427 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 191 [2020-08-18 18:51:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:16,460 INFO L225 Difference]: With dead ends: 6901 [2020-08-18 18:51:16,461 INFO L226 Difference]: Without dead ends: 4625 [2020-08-18 18:51:16,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:51:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4625 states. [2020-08-18 18:51:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4625 to 4205. [2020-08-18 18:51:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4205 states. [2020-08-18 18:51:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4205 states to 4205 states and 5340 transitions. [2020-08-18 18:51:17,029 INFO L78 Accepts]: Start accepts. Automaton has 4205 states and 5340 transitions. Word has length 191 [2020-08-18 18:51:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:17,030 INFO L479 AbstractCegarLoop]: Abstraction has 4205 states and 5340 transitions. [2020-08-18 18:51:17,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:51:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4205 states and 5340 transitions. [2020-08-18 18:51:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-08-18 18:51:17,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:17,040 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:51:17,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:51:17,041 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:17,041 INFO L82 PathProgramCache]: Analyzing trace with hash -635516700, now seen corresponding path program 1 times [2020-08-18 18:51:17,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:17,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26021753] [2020-08-18 18:51:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:51:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 18:51:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 18:51:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-18 18:51:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 18:51:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 18:51:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-18 18:51:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-08-18 18:51:17,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26021753] [2020-08-18 18:51:17,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:51:17,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:51:17,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608675659] [2020-08-18 18:51:17,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:51:17,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:17,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:51:17,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:51:17,363 INFO L87 Difference]: Start difference. First operand 4205 states and 5340 transitions. Second operand 10 states. [2020-08-18 18:51:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:19,223 INFO L93 Difference]: Finished difference Result 8766 states and 11212 transitions. [2020-08-18 18:51:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:51:19,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 249 [2020-08-18 18:51:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:19,249 INFO L225 Difference]: With dead ends: 8766 [2020-08-18 18:51:19,250 INFO L226 Difference]: Without dead ends: 4582 [2020-08-18 18:51:19,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:51:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2020-08-18 18:51:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4198. [2020-08-18 18:51:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2020-08-18 18:51:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5326 transitions. [2020-08-18 18:51:19,697 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5326 transitions. Word has length 249 [2020-08-18 18:51:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:19,697 INFO L479 AbstractCegarLoop]: Abstraction has 4198 states and 5326 transitions. [2020-08-18 18:51:19,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:51:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5326 transitions. [2020-08-18 18:51:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 18:51:19,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:19,705 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:19,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:51:19,705 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2111585836, now seen corresponding path program 1 times [2020-08-18 18:51:19,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:19,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447394056] [2020-08-18 18:51:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:51:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 18:51:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:19,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:20,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:20,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 18:51:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:20,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 18:51:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:20,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 18:51:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-18 18:51:20,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447394056] [2020-08-18 18:51:20,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:51:20,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:51:20,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686715518] [2020-08-18 18:51:20,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:51:20,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:51:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:51:20,143 INFO L87 Difference]: Start difference. First operand 4198 states and 5326 transitions. Second operand 13 states. [2020-08-18 18:51:20,573 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-08-18 18:51:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:23,815 INFO L93 Difference]: Finished difference Result 11304 states and 15162 transitions. [2020-08-18 18:51:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 18:51:23,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2020-08-18 18:51:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:23,865 INFO L225 Difference]: With dead ends: 11304 [2020-08-18 18:51:23,865 INFO L226 Difference]: Without dead ends: 5377 [2020-08-18 18:51:23,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2020-08-18 18:51:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2020-08-18 18:51:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4715. [2020-08-18 18:51:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2020-08-18 18:51:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 5844 transitions. [2020-08-18 18:51:24,837 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 5844 transitions. Word has length 192 [2020-08-18 18:51:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:24,838 INFO L479 AbstractCegarLoop]: Abstraction has 4715 states and 5844 transitions. [2020-08-18 18:51:24,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:51:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 5844 transitions. [2020-08-18 18:51:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 18:51:24,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:24,854 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:24,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:51:24,855 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1309799228, now seen corresponding path program 1 times [2020-08-18 18:51:24,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:24,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179857927] [2020-08-18 18:51:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:24,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 18:51:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 18:51:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 18:51:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 18:51:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 18:51:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 18:51:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-18 18:51:25,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179857927] [2020-08-18 18:51:25,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:51:25,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:51:25,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812653641] [2020-08-18 18:51:25,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:51:25,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:51:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:51:25,346 INFO L87 Difference]: Start difference. First operand 4715 states and 5844 transitions. Second operand 10 states. [2020-08-18 18:51:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:28,403 INFO L93 Difference]: Finished difference Result 9794 states and 12543 transitions. [2020-08-18 18:51:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:51:28,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2020-08-18 18:51:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:28,433 INFO L225 Difference]: With dead ends: 9794 [2020-08-18 18:51:28,433 INFO L226 Difference]: Without dead ends: 5101 [2020-08-18 18:51:28,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:51:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2020-08-18 18:51:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4723. [2020-08-18 18:51:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2020-08-18 18:51:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 5800 transitions. [2020-08-18 18:51:28,962 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 5800 transitions. Word has length 219 [2020-08-18 18:51:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:28,963 INFO L479 AbstractCegarLoop]: Abstraction has 4723 states and 5800 transitions. [2020-08-18 18:51:28,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:51:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 5800 transitions. [2020-08-18 18:51:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 18:51:28,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:28,971 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:28,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:51:28,971 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:28,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1042203604, now seen corresponding path program 1 times [2020-08-18 18:51:28,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:28,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787110181] [2020-08-18 18:51:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:51:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 18:51:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 18:51:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-18 18:51:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 18:51:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 18:51:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-08-18 18:51:29,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787110181] [2020-08-18 18:51:29,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:51:29,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:51:29,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836404145] [2020-08-18 18:51:29,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:51:29,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:51:29,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:51:29,324 INFO L87 Difference]: Start difference. First operand 4723 states and 5800 transitions. Second operand 13 states. [2020-08-18 18:51:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:33,306 INFO L93 Difference]: Finished difference Result 14278 states and 19378 transitions. [2020-08-18 18:51:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 18:51:33,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2020-08-18 18:51:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:33,352 INFO L225 Difference]: With dead ends: 14278 [2020-08-18 18:51:33,352 INFO L226 Difference]: Without dead ends: 9577 [2020-08-18 18:51:33,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 18:51:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2020-08-18 18:51:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 8707. [2020-08-18 18:51:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8707 states. [2020-08-18 18:51:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8707 states to 8707 states and 10918 transitions. [2020-08-18 18:51:34,083 INFO L78 Accepts]: Start accepts. Automaton has 8707 states and 10918 transitions. Word has length 219 [2020-08-18 18:51:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:34,084 INFO L479 AbstractCegarLoop]: Abstraction has 8707 states and 10918 transitions. [2020-08-18 18:51:34,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:51:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8707 states and 10918 transitions. [2020-08-18 18:51:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 18:51:34,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:34,097 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:34,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:51:34,098 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1201228700, now seen corresponding path program 1 times [2020-08-18 18:51:34,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:34,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837486337] [2020-08-18 18:51:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:51:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 18:51:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 18:51:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-18 18:51:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 18:51:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 18:51:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-08-18 18:51:34,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837486337] [2020-08-18 18:51:34,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:51:34,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:51:34,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901215054] [2020-08-18 18:51:34,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:51:34,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:34,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:51:34,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:51:34,539 INFO L87 Difference]: Start difference. First operand 8707 states and 10918 transitions. Second operand 11 states. [2020-08-18 18:51:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:51:38,348 INFO L93 Difference]: Finished difference Result 24719 states and 32887 transitions. [2020-08-18 18:51:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 18:51:38,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 220 [2020-08-18 18:51:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:51:38,444 INFO L225 Difference]: With dead ends: 24719 [2020-08-18 18:51:38,444 INFO L226 Difference]: Without dead ends: 16040 [2020-08-18 18:51:38,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:51:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16040 states. [2020-08-18 18:51:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16040 to 15546. [2020-08-18 18:51:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15546 states. [2020-08-18 18:51:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 19508 transitions. [2020-08-18 18:51:39,684 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 19508 transitions. Word has length 220 [2020-08-18 18:51:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:51:39,685 INFO L479 AbstractCegarLoop]: Abstraction has 15546 states and 19508 transitions. [2020-08-18 18:51:39,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:51:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 19508 transitions. [2020-08-18 18:51:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 18:51:39,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:51:39,702 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:51:39,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:51:39,702 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:51:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:51:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1963777708, now seen corresponding path program 1 times [2020-08-18 18:51:39,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:51:39,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599176881] [2020-08-18 18:51:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:51:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:51:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:51:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:51:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:51:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:51:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:51:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:51:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:39,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:51:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 18:51:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 18:51:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-18 18:51:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:51:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 18:51:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:51:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:51:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:51:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:51:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:51:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 18:51:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:51:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-08-18 18:51:40,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599176881] [2020-08-18 18:51:40,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:51:40,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 18:51:40,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168529702] [2020-08-18 18:51:40,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 18:51:40,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:51:40,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 18:51:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:51:40,221 INFO L87 Difference]: Start difference. First operand 15546 states and 19508 transitions. Second operand 18 states.