/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=SMALLEST -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 17:14:07,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:14:07,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:14:07,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:14:07,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:14:07,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:14:07,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:14:07,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:14:07,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:14:07,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:14:07,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:14:07,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:14:07,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:14:07,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:14:07,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:14:07,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:14:07,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:14:07,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:14:07,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:14:07,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:14:07,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:14:07,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:14:07,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:14:07,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:14:07,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:14:07,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:14:07,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:14:07,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:14:07,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:14:07,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:14:07,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:14:07,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:14:07,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:14:07,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:14:07,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:14:07,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:14:08,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:14:08,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:14:08,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:14:08,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:14:08,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:14:08,003 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 17:14:08,040 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:14:08,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:14:08,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:14:08,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:14:08,043 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:14:08,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:14:08,043 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:14:08,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:14:08,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:14:08,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:14:08,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:14:08,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:14:08,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:14:08,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:14:08,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:14:08,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:14:08,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:14:08,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:14:08,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:14:08,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:14:08,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:14:08,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:14:08,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:14:08,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:14:08,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:14:08,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:14:08,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:14:08,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:14:08,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:14:08,049 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:14:08,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:14:08,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:14:08,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:14:08,372 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:14:08,372 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:14:08,373 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-18 17:14:08,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bbf115d1/64938d22bcfa41ff9ef4453f134601e4/FLAG57d33e780 [2020-08-18 17:14:08,905 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:14:08,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-18 17:14:08,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bbf115d1/64938d22bcfa41ff9ef4453f134601e4/FLAG57d33e780 [2020-08-18 17:14:09,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bbf115d1/64938d22bcfa41ff9ef4453f134601e4 [2020-08-18 17:14:09,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:14:09,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:14:09,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:14:09,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:14:09,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:14:09,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3178309e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09, skipping insertion in model container [2020-08-18 17:14:09,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:14:09,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:14:09,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:14:09,551 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:14:09,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:14:09,718 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:14:09,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09 WrapperNode [2020-08-18 17:14:09,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:14:09,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:14:09,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:14:09,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:14:09,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (1/1) ... [2020-08-18 17:14:09,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:14:09,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:14:09,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:14:09,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:14:09,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (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 17:14:09,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:14:09,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:14:09,837 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 17:14:09,838 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-18 17:14:09,838 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-18 17:14:09,838 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-08-18 17:14:09,838 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-18 17:14:09,838 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-18 17:14:09,839 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-08-18 17:14:09,839 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-18 17:14:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 17:14:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 17:14:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 17:14:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-18 17:14:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-18 17:14:09,841 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-18 17:14:09,841 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-18 17:14:09,841 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-18 17:14:09,841 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-18 17:14:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 17:14:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 17:14:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 17:14:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:14:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:14:09,845 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 17:14:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-18 17:14:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-18 17:14:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-08-18 17:14:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-18 17:14:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:14:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-18 17:14:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-18 17:14:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-08-18 17:14:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-18 17:14:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 17:14:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 17:14:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 17:14:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-18 17:14:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-18 17:14:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-18 17:14:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-18 17:14:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-18 17:14:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 17:14:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 17:14:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 17:14:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:14:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:14:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:14:10,455 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:14:10,456 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 17:14:10,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:14:10 BoogieIcfgContainer [2020-08-18 17:14:10,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:14:10,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:14:10,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:14:10,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:14:10,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:14:09" (1/3) ... [2020-08-18 17:14:10,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7122fb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:14:10, skipping insertion in model container [2020-08-18 17:14:10,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:14:09" (2/3) ... [2020-08-18 17:14:10,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7122fb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:14:10, skipping insertion in model container [2020-08-18 17:14:10,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:14:10" (3/3) ... [2020-08-18 17:14:10,474 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2020-08-18 17:14:10,485 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:14:10,494 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:14:10,509 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:14:10,535 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:14:10,535 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:14:10,535 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:14:10,535 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:14:10,536 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:14:10,536 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:14:10,536 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:14:10,536 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:14:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-08-18 17:14:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:10,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:10,573 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 17:14:10,573 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash -67309704, now seen corresponding path program 1 times [2020-08-18 17:14:10,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:10,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263234891] [2020-08-18 17:14:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:10,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:10,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:11,343 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 17:14:11,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263234891] [2020-08-18 17:14:11,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:11,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 17:14:11,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950243127] [2020-08-18 17:14:11,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:14:11,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:11,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:14:11,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:14:11,370 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 14 states. [2020-08-18 17:14:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:14,365 INFO L93 Difference]: Finished difference Result 449 states and 710 transitions. [2020-08-18 17:14:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:14:14,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-08-18 17:14:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:14,395 INFO L225 Difference]: With dead ends: 449 [2020-08-18 17:14:14,395 INFO L226 Difference]: Without dead ends: 276 [2020-08-18 17:14:14,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:14:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-08-18 17:14:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-08-18 17:14:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 17:14:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2020-08-18 17:14:14,490 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 92 [2020-08-18 17:14:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:14,491 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2020-08-18 17:14:14,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:14:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2020-08-18 17:14:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:14,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:14,496 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 17:14:14,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:14:14,497 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2098275908, now seen corresponding path program 1 times [2020-08-18 17:14:14,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:14,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166092690] [2020-08-18 17:14:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:14,767 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 17:14:14,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166092690] [2020-08-18 17:14:14,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:14,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:14:14,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10990131] [2020-08-18 17:14:14,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:14,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:14,772 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand 10 states. [2020-08-18 17:14:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:16,291 INFO L93 Difference]: Finished difference Result 425 states and 610 transitions. [2020-08-18 17:14:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:14:16,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 17:14:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:16,295 INFO L225 Difference]: With dead ends: 425 [2020-08-18 17:14:16,296 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 17:14:16,298 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 17:14:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 17:14:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2020-08-18 17:14:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 17:14:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 234 transitions. [2020-08-18 17:14:16,334 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 234 transitions. Word has length 92 [2020-08-18 17:14:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:16,335 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 234 transitions. [2020-08-18 17:14:16,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 234 transitions. [2020-08-18 17:14:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:16,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:16,340 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 17:14:16,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:14:16,341 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1653808840, now seen corresponding path program 1 times [2020-08-18 17:14:16,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:16,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68694716] [2020-08-18 17:14:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:16,706 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 17:14:16,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68694716] [2020-08-18 17:14:16,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:16,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:14:16,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688659740] [2020-08-18 17:14:16,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:16,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:16,712 INFO L87 Difference]: Start difference. First operand 177 states and 234 transitions. Second operand 10 states. [2020-08-18 17:14:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:18,631 INFO L93 Difference]: Finished difference Result 504 states and 747 transitions. [2020-08-18 17:14:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:14:18,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 17:14:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:18,638 INFO L225 Difference]: With dead ends: 504 [2020-08-18 17:14:18,638 INFO L226 Difference]: Without dead ends: 347 [2020-08-18 17:14:18,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:14:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-08-18 17:14:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 213. [2020-08-18 17:14:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-18 17:14:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2020-08-18 17:14:18,696 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 92 [2020-08-18 17:14:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:18,697 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2020-08-18 17:14:18,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:18,697 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2020-08-18 17:14:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:18,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:18,699 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 17:14:18,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:14:18,700 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash -550041895, now seen corresponding path program 1 times [2020-08-18 17:14:18,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:18,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902121206] [2020-08-18 17:14:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:18,883 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 17:14:18,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902121206] [2020-08-18 17:14:18,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:18,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:14:18,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679679896] [2020-08-18 17:14:18,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:18,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:18,886 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand 10 states. [2020-08-18 17:14:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:20,788 INFO L93 Difference]: Finished difference Result 586 states and 840 transitions. [2020-08-18 17:14:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:14:20,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 17:14:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:20,792 INFO L225 Difference]: With dead ends: 586 [2020-08-18 17:14:20,793 INFO L226 Difference]: Without dead ends: 393 [2020-08-18 17:14:20,794 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 17:14:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-18 17:14:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 249. [2020-08-18 17:14:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-18 17:14:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 312 transitions. [2020-08-18 17:14:20,848 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 312 transitions. Word has length 92 [2020-08-18 17:14:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:20,849 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 312 transitions. [2020-08-18 17:14:20,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 312 transitions. [2020-08-18 17:14:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:20,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:20,860 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 17:14:20,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:14:20,861 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1219969707, now seen corresponding path program 1 times [2020-08-18 17:14:20,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:20,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490982274] [2020-08-18 17:14:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:20,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:20,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:20,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:21,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:21,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:21,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:21,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:21,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:21,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:21,061 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 17:14:21,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490982274] [2020-08-18 17:14:21,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:21,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:14:21,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031396314] [2020-08-18 17:14:21,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:21,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:21,064 INFO L87 Difference]: Start difference. First operand 249 states and 312 transitions. Second operand 10 states. [2020-08-18 17:14:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:22,925 INFO L93 Difference]: Finished difference Result 663 states and 922 transitions. [2020-08-18 17:14:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:14:22,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 17:14:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:22,930 INFO L225 Difference]: With dead ends: 663 [2020-08-18 17:14:22,930 INFO L226 Difference]: Without dead ends: 434 [2020-08-18 17:14:22,932 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 17:14:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-08-18 17:14:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 282. [2020-08-18 17:14:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-18 17:14:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2020-08-18 17:14:22,964 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 92 [2020-08-18 17:14:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:22,964 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2020-08-18 17:14:22,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2020-08-18 17:14:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:22,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:22,966 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 17:14:22,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:14:22,967 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:22,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1929357560, now seen corresponding path program 1 times [2020-08-18 17:14:22,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:22,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754876893] [2020-08-18 17:14:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:23,207 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 17:14:23,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754876893] [2020-08-18 17:14:23,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:23,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:14:23,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647107456] [2020-08-18 17:14:23,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:23,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:23,211 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand 10 states. [2020-08-18 17:14:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:25,004 INFO L93 Difference]: Finished difference Result 674 states and 877 transitions. [2020-08-18 17:14:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:14:25,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 17:14:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:25,009 INFO L225 Difference]: With dead ends: 674 [2020-08-18 17:14:25,009 INFO L226 Difference]: Without dead ends: 413 [2020-08-18 17:14:25,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:14:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-18 17:14:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 287. [2020-08-18 17:14:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-08-18 17:14:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 347 transitions. [2020-08-18 17:14:25,041 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 347 transitions. Word has length 92 [2020-08-18 17:14:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:25,041 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 347 transitions. [2020-08-18 17:14:25,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 347 transitions. [2020-08-18 17:14:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:25,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:25,043 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 17:14:25,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:14:25,044 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:25,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1031964282, now seen corresponding path program 1 times [2020-08-18 17:14:25,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:25,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540945832] [2020-08-18 17:14:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:25,235 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 17:14:25,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540945832] [2020-08-18 17:14:25,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:25,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:14:25,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113420949] [2020-08-18 17:14:25,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:25,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:25,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:25,238 INFO L87 Difference]: Start difference. First operand 287 states and 347 transitions. Second operand 10 states. [2020-08-18 17:14:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:27,706 INFO L93 Difference]: Finished difference Result 1068 states and 1350 transitions. [2020-08-18 17:14:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 17:14:27,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 17:14:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:27,712 INFO L225 Difference]: With dead ends: 1068 [2020-08-18 17:14:27,712 INFO L226 Difference]: Without dead ends: 801 [2020-08-18 17:14:27,714 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 17:14:27,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2020-08-18 17:14:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 591. [2020-08-18 17:14:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-18 17:14:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 707 transitions. [2020-08-18 17:14:27,784 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 707 transitions. Word has length 92 [2020-08-18 17:14:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:27,786 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 707 transitions. [2020-08-18 17:14:27,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 707 transitions. [2020-08-18 17:14:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:14:27,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:27,789 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 17:14:27,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:14:27,790 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1054596536, now seen corresponding path program 1 times [2020-08-18 17:14:27,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:27,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896065978] [2020-08-18 17:14:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:14:27,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896065978] [2020-08-18 17:14:27,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:27,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:14:27,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403502795] [2020-08-18 17:14:27,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:14:27,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:14:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:14:27,964 INFO L87 Difference]: Start difference. First operand 591 states and 707 transitions. Second operand 7 states. [2020-08-18 17:14:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:29,779 INFO L93 Difference]: Finished difference Result 2051 states and 2640 transitions. [2020-08-18 17:14:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:14:29,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-08-18 17:14:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:29,790 INFO L225 Difference]: With dead ends: 2051 [2020-08-18 17:14:29,790 INFO L226 Difference]: Without dead ends: 1481 [2020-08-18 17:14:29,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:14:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-08-18 17:14:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1207. [2020-08-18 17:14:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-08-18 17:14:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1495 transitions. [2020-08-18 17:14:29,929 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1495 transitions. Word has length 92 [2020-08-18 17:14:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:29,929 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1495 transitions. [2020-08-18 17:14:29,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:14:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1495 transitions. [2020-08-18 17:14:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 17:14:29,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:29,934 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 17:14:29,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:14:29,934 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1357284192, now seen corresponding path program 1 times [2020-08-18 17:14:29,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:29,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739524144] [2020-08-18 17:14:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 17:14:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-18 17:14:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:30,170 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 17:14:30,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739524144] [2020-08-18 17:14:30,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:30,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 17:14:30,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233186735] [2020-08-18 17:14:30,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:14:30,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:14:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:14:30,173 INFO L87 Difference]: Start difference. First operand 1207 states and 1495 transitions. Second operand 9 states. [2020-08-18 17:14:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:32,887 INFO L93 Difference]: Finished difference Result 3860 states and 4987 transitions. [2020-08-18 17:14:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:14:32,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2020-08-18 17:14:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:32,943 INFO L225 Difference]: With dead ends: 3860 [2020-08-18 17:14:32,943 INFO L226 Difference]: Without dead ends: 2675 [2020-08-18 17:14:32,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:14:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-08-18 17:14:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2303. [2020-08-18 17:14:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-18 17:14:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2940 transitions. [2020-08-18 17:14:33,182 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2940 transitions. Word has length 147 [2020-08-18 17:14:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:33,184 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2940 transitions. [2020-08-18 17:14:33,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:14:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2940 transitions. [2020-08-18 17:14:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-08-18 17:14:33,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:33,194 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:14:33,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:14:33,195 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1620831515, now seen corresponding path program 1 times [2020-08-18 17:14:33,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:33,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562631480] [2020-08-18 17:14:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 17:14:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 17:14:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 17:14:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-18 17:14:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-08-18 17:14:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-08-18 17:14:33,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562631480] [2020-08-18 17:14:33,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:33,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 17:14:33,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945104346] [2020-08-18 17:14:33,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:14:33,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:14:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:14:33,579 INFO L87 Difference]: Start difference. First operand 2303 states and 2940 transitions. Second operand 11 states. [2020-08-18 17:14:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:35,178 INFO L93 Difference]: Finished difference Result 4832 states and 6206 transitions. [2020-08-18 17:14:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:14:35,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 248 [2020-08-18 17:14:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:35,195 INFO L225 Difference]: With dead ends: 4832 [2020-08-18 17:14:35,196 INFO L226 Difference]: Without dead ends: 2550 [2020-08-18 17:14:35,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:14:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2020-08-18 17:14:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2296. [2020-08-18 17:14:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2296 states. [2020-08-18 17:14:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 2926 transitions. [2020-08-18 17:14:35,469 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 2926 transitions. Word has length 248 [2020-08-18 17:14:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:35,469 INFO L479 AbstractCegarLoop]: Abstraction has 2296 states and 2926 transitions. [2020-08-18 17:14:35,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:14:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 2926 transitions. [2020-08-18 17:14:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-08-18 17:14:35,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:35,475 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 17:14:35,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:14:35,475 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash 674078602, now seen corresponding path program 1 times [2020-08-18 17:14:35,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:35,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007406253] [2020-08-18 17:14:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 17:14:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-18 17:14:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 17:14:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:35,837 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 17:14:35,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007406253] [2020-08-18 17:14:35,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:14:35,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:14:35,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620164929] [2020-08-18 17:14:35,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:35,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:35,840 INFO L87 Difference]: Start difference. First operand 2296 states and 2926 transitions. Second operand 10 states. [2020-08-18 17:14:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:38,577 INFO L93 Difference]: Finished difference Result 6861 states and 9505 transitions. [2020-08-18 17:14:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:14:38,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 191 [2020-08-18 17:14:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:38,606 INFO L225 Difference]: With dead ends: 6861 [2020-08-18 17:14:38,606 INFO L226 Difference]: Without dead ends: 4586 [2020-08-18 17:14:38,619 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 17:14:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2020-08-18 17:14:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4198. [2020-08-18 17:14:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2020-08-18 17:14:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5326 transitions. [2020-08-18 17:14:39,109 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5326 transitions. Word has length 191 [2020-08-18 17:14:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:39,111 INFO L479 AbstractCegarLoop]: Abstraction has 4198 states and 5326 transitions. [2020-08-18 17:14:39,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5326 transitions. [2020-08-18 17:14:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 17:14:39,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:39,118 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 17:14:39,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:14:39,119 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2111585836, now seen corresponding path program 1 times [2020-08-18 17:14:39,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:39,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349215997] [2020-08-18 17:14:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 17:14:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 17:14:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 17:14:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 17:14:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 17:14:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:39,640 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 17:14:39,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349215997] [2020-08-18 17:14:39,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:14:39,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:14:39,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074118703] [2020-08-18 17:14:39,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:14:39,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:14:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:14:39,643 INFO L87 Difference]: Start difference. First operand 4198 states and 5326 transitions. Second operand 13 states. [2020-08-18 17:14:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:43,258 INFO L93 Difference]: Finished difference Result 11304 states and 15162 transitions. [2020-08-18 17:14:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:14:43,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2020-08-18 17:14:43,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:43,288 INFO L225 Difference]: With dead ends: 11304 [2020-08-18 17:14:43,288 INFO L226 Difference]: Without dead ends: 5377 [2020-08-18 17:14:43,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2020-08-18 17:14:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2020-08-18 17:14:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4715. [2020-08-18 17:14:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2020-08-18 17:14:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 5844 transitions. [2020-08-18 17:14:44,223 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 5844 transitions. Word has length 192 [2020-08-18 17:14:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:44,224 INFO L479 AbstractCegarLoop]: Abstraction has 4715 states and 5844 transitions. [2020-08-18 17:14:44,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:14:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 5844 transitions. [2020-08-18 17:14:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 17:14:44,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:44,238 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 17:14:44,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:14:44,238 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1309799228, now seen corresponding path program 1 times [2020-08-18 17:14:44,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:44,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434675434] [2020-08-18 17:14:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 17:14:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 17:14:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 17:14:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 17:14:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 17:14:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 17:14:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:44,715 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 17:14:44,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434675434] [2020-08-18 17:14:44,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:14:44,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:14:44,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171907614] [2020-08-18 17:14:44,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:14:44,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:14:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:14:44,719 INFO L87 Difference]: Start difference. First operand 4715 states and 5844 transitions. Second operand 10 states. [2020-08-18 17:14:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:47,546 INFO L93 Difference]: Finished difference Result 9794 states and 12543 transitions. [2020-08-18 17:14:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:14:47,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2020-08-18 17:14:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:47,576 INFO L225 Difference]: With dead ends: 9794 [2020-08-18 17:14:47,577 INFO L226 Difference]: Without dead ends: 5101 [2020-08-18 17:14:47,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:14:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2020-08-18 17:14:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4723. [2020-08-18 17:14:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2020-08-18 17:14:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 5800 transitions. [2020-08-18 17:14:48,107 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 5800 transitions. Word has length 219 [2020-08-18 17:14:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:48,108 INFO L479 AbstractCegarLoop]: Abstraction has 4723 states and 5800 transitions. [2020-08-18 17:14:48,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:14:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 5800 transitions. [2020-08-18 17:14:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 17:14:48,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:48,116 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 17:14:48,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:14:48,116 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:48,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1042203604, now seen corresponding path program 1 times [2020-08-18 17:14:48,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:48,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244994092] [2020-08-18 17:14:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 17:14:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 17:14:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 17:14:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-18 17:14:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 17:14:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 17:14:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:48,482 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 17:14:48,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244994092] [2020-08-18 17:14:48,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:14:48,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:14:48,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641258427] [2020-08-18 17:14:48,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:14:48,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:48,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:14:48,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:14:48,485 INFO L87 Difference]: Start difference. First operand 4723 states and 5800 transitions. Second operand 13 states. [2020-08-18 17:14:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:52,141 INFO L93 Difference]: Finished difference Result 14278 states and 19378 transitions. [2020-08-18 17:14:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 17:14:52,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2020-08-18 17:14:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:52,199 INFO L225 Difference]: With dead ends: 14278 [2020-08-18 17:14:52,199 INFO L226 Difference]: Without dead ends: 9577 [2020-08-18 17:14:52,226 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 17:14:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2020-08-18 17:14:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 8707. [2020-08-18 17:14:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8707 states. [2020-08-18 17:14:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8707 states to 8707 states and 10918 transitions. [2020-08-18 17:14:53,054 INFO L78 Accepts]: Start accepts. Automaton has 8707 states and 10918 transitions. Word has length 219 [2020-08-18 17:14:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:53,054 INFO L479 AbstractCegarLoop]: Abstraction has 8707 states and 10918 transitions. [2020-08-18 17:14:53,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:14:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 8707 states and 10918 transitions. [2020-08-18 17:14:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 17:14:53,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:53,066 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 17:14:53,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:14:53,067 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1201228700, now seen corresponding path program 1 times [2020-08-18 17:14:53,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:53,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571730955] [2020-08-18 17:14:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 17:14:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 17:14:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 17:14:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-18 17:14:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 17:14:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 17:14:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:53,418 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 17:14:53,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571730955] [2020-08-18 17:14:53,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:14:53,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:14:53,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218743704] [2020-08-18 17:14:53,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:14:53,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:14:53,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:14:53,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:14:53,422 INFO L87 Difference]: Start difference. First operand 8707 states and 10918 transitions. Second operand 11 states. [2020-08-18 17:14:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:14:57,471 INFO L93 Difference]: Finished difference Result 24719 states and 32887 transitions. [2020-08-18 17:14:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:14:57,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 220 [2020-08-18 17:14:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:14:57,552 INFO L225 Difference]: With dead ends: 24719 [2020-08-18 17:14:57,552 INFO L226 Difference]: Without dead ends: 16040 [2020-08-18 17:14:57,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:14:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16040 states. [2020-08-18 17:14:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16040 to 15546. [2020-08-18 17:14:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15546 states. [2020-08-18 17:14:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 19508 transitions. [2020-08-18 17:14:59,388 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 19508 transitions. Word has length 220 [2020-08-18 17:14:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:14:59,389 INFO L479 AbstractCegarLoop]: Abstraction has 15546 states and 19508 transitions. [2020-08-18 17:14:59,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:14:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 19508 transitions. [2020-08-18 17:14:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 17:14:59,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:14:59,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 17:14:59,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:14:59,406 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:14:59,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:14:59,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1963777708, now seen corresponding path program 1 times [2020-08-18 17:14:59,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:14:59,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254509652] [2020-08-18 17:14:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:14:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:14:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:14:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:14:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:14:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:14:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:14:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:14:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 17:14:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 17:14:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 17:14:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-18 17:14:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:14:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 17:14:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:14:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:14:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:14:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:14:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:14:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:14:59,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 17:14:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:15:00,010 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 17:15:00,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254509652] [2020-08-18 17:15:00,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:15:00,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 17:15:00,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311237732] [2020-08-18 17:15:00,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 17:15:00,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:15:00,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 17:15:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:15:00,018 INFO L87 Difference]: Start difference. First operand 15546 states and 19508 transitions. Second operand 18 states.