/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:08:27,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:08:27,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:08:27,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:08:27,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:08:27,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:08:27,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:08:27,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:08:27,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:08:27,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:08:27,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:08:27,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:08:27,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:08:27,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:08:27,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:08:27,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:08:27,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:08:27,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:08:27,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:08:27,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:08:27,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:08:27,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:08:27,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:08:27,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:08:27,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:08:27,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:08:27,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:08:27,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:08:27,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:08:28,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:08:28,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:08:28,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:08:28,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:08:28,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:08:28,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:08:28,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:08:28,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:08:28,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:08:28,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:08:28,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:08:28,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:08:28,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:08:28,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:08:28,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:08:28,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:08:28,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:08:28,055 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:08:28,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:08:28,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:08:28,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:08:28,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:08:28,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:08:28,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:08:28,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:08:28,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:08:28,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:08:28,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:08:28,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:08:28,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:08:28,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:08:28,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:08:28,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:08:28,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:08:28,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:08:28,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:08:28,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:08:28,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:08:28,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:08:28,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:08:28,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:08:28,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:08:28,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 23:08:28,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:08:28,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:08:28,373 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:08:28,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:08:28,375 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:08:28,376 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 23:08:28,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f50b1dfb4/12b4b77c06ca4a829389a07661859a80/FLAG6b4c3f528 [2020-08-21 23:08:28,922 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:08:28,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 23:08:28,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f50b1dfb4/12b4b77c06ca4a829389a07661859a80/FLAG6b4c3f528 [2020-08-21 23:08:29,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f50b1dfb4/12b4b77c06ca4a829389a07661859a80 [2020-08-21 23:08:29,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:08:29,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:08:29,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:08:29,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:08:29,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:08:29,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a2ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29, skipping insertion in model container [2020-08-21 23:08:29,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:08:29,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:08:29,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:08:29,545 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:08:29,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:08:29,602 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:08:29,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29 WrapperNode [2020-08-21 23:08:29,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:08:29,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:08:29,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:08:29,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:08:29,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... [2020-08-21 23:08:29,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:08:29,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:08:29,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:08:29,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:08:29,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:08:29,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:08:29,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:08:29,799 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 23:08:29,799 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 23:08:29,799 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 23:08:29,799 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 23:08:29,800 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 23:08:29,800 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 23:08:29,800 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 23:08:29,800 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 23:08:29,800 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 23:08:29,800 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 23:08:29,800 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 23:08:29,801 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 23:08:29,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:08:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:08:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:08:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 23:08:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 23:08:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 23:08:29,802 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 23:08:29,802 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 23:08:29,802 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 23:08:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 23:08:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 23:08:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 23:08:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 23:08:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 23:08:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 23:08:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:08:29,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:08:29,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:08:30,221 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:08:30,222 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 23:08:30,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:08:30 BoogieIcfgContainer [2020-08-21 23:08:30,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:08:30,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:08:30,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:08:30,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:08:30,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:08:29" (1/3) ... [2020-08-21 23:08:30,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367b7265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:08:30, skipping insertion in model container [2020-08-21 23:08:30,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:29" (2/3) ... [2020-08-21 23:08:30,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367b7265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:08:30, skipping insertion in model container [2020-08-21 23:08:30,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:08:30" (3/3) ... [2020-08-21 23:08:30,236 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-21 23:08:30,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:08:30,251 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:08:30,268 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:08:30,293 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:08:30,294 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:08:30,294 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:08:30,294 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:08:30,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:08:30,295 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:08:30,295 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:08:30,295 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:08:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-21 23:08:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 23:08:30,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:30,331 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] [2020-08-21 23:08:30,331 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-21 23:08:30,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:30,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227192970] [2020-08-21 23:08:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 23:08:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:30,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227192970] [2020-08-21 23:08:30,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:30,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:08:30,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721522319] [2020-08-21 23:08:30,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:08:30,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:30,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:08:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:08:30,880 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-21 23:08:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:32,091 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-21 23:08:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:08:32,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 23:08:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:32,110 INFO L225 Difference]: With dead ends: 356 [2020-08-21 23:08:32,110 INFO L226 Difference]: Without dead ends: 248 [2020-08-21 23:08:32,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:08:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-21 23:08:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-21 23:08:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 23:08:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-21 23:08:32,201 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-21 23:08:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:32,202 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-21 23:08:32,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:08:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-21 23:08:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 23:08:32,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:32,208 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] [2020-08-21 23:08:32,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:08:32,209 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-21 23:08:32,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:32,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470942342] [2020-08-21 23:08:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:08:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:32,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470942342] [2020-08-21 23:08:32,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:32,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:08:32,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649713374] [2020-08-21 23:08:32,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:08:32,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:32,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:08:32,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:08:32,402 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-21 23:08:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:33,065 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-21 23:08:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:08:33,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-21 23:08:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:33,069 INFO L225 Difference]: With dead ends: 406 [2020-08-21 23:08:33,070 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 23:08:33,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:08:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 23:08:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-21 23:08:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 23:08:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-21 23:08:33,110 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-21 23:08:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:33,111 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-21 23:08:33,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:08:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-21 23:08:33,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 23:08:33,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:33,114 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] [2020-08-21 23:08:33,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:08:33,115 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:33,115 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-21 23:08:33,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:33,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833275119] [2020-08-21 23:08:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:08:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 23:08:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:33,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833275119] [2020-08-21 23:08:33,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:33,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:08:33,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830319155] [2020-08-21 23:08:33,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:08:33,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:33,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:08:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:08:33,368 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-21 23:08:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:34,696 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-21 23:08:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:08:34,697 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-21 23:08:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:34,708 INFO L225 Difference]: With dead ends: 582 [2020-08-21 23:08:34,709 INFO L226 Difference]: Without dead ends: 417 [2020-08-21 23:08:34,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-21 23:08:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-21 23:08:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-21 23:08:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-21 23:08:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-21 23:08:34,813 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-21 23:08:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:34,817 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-21 23:08:34,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:08:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-21 23:08:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 23:08:34,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:34,826 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] [2020-08-21 23:08:34,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:08:34,826 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-21 23:08:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:34,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207739095] [2020-08-21 23:08:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:34,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:34,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:08:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:08:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:35,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207739095] [2020-08-21 23:08:35,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:35,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 23:08:35,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346654018] [2020-08-21 23:08:35,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:08:35,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:35,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:08:35,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:08:35,114 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-21 23:08:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:38,089 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-21 23:08:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 23:08:38,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-21 23:08:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:38,096 INFO L225 Difference]: With dead ends: 873 [2020-08-21 23:08:38,097 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 23:08:38,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 23:08:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 23:08:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-21 23:08:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 23:08:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 23:08:38,168 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-21 23:08:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:38,169 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 23:08:38,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:08:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 23:08:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 23:08:38,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:38,172 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] [2020-08-21 23:08:38,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:08:38,181 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:38,184 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-21 23:08:38,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:38,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091084640] [2020-08-21 23:08:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:08:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:38,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091084640] [2020-08-21 23:08:38,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:38,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:08:38,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093254489] [2020-08-21 23:08:38,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:08:38,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:08:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:08:38,426 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-21 23:08:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:39,576 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-21 23:08:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:08:39,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-21 23:08:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:39,581 INFO L225 Difference]: With dead ends: 612 [2020-08-21 23:08:39,582 INFO L226 Difference]: Without dead ends: 418 [2020-08-21 23:08:39,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:08:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-21 23:08:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-21 23:08:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 23:08:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-21 23:08:39,620 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-21 23:08:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:39,621 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-21 23:08:39,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:08:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-21 23:08:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 23:08:39,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:39,622 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] [2020-08-21 23:08:39,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:08:39,622 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-21 23:08:39,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:39,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913708210] [2020-08-21 23:08:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:08:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:39,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913708210] [2020-08-21 23:08:39,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:39,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:08:39,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328439157] [2020-08-21 23:08:39,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:08:39,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:39,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:08:39,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:08:39,811 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-21 23:08:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:40,715 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-21 23:08:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:08:40,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 23:08:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:40,721 INFO L225 Difference]: With dead ends: 727 [2020-08-21 23:08:40,722 INFO L226 Difference]: Without dead ends: 421 [2020-08-21 23:08:40,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:08:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-21 23:08:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-21 23:08:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-21 23:08:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-21 23:08:40,776 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-21 23:08:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:40,777 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-21 23:08:40,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:08:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-21 23:08:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 23:08:40,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:40,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:40,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:08:40,780 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:40,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-21 23:08:40,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:40,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173739071] [2020-08-21 23:08:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:08:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:40,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173739071] [2020-08-21 23:08:40,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:40,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:08:40,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776390436] [2020-08-21 23:08:40,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:08:40,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:40,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:08:40,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:08:40,999 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-21 23:08:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:43,603 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-21 23:08:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 23:08:43,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 23:08:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:43,612 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 23:08:43,612 INFO L226 Difference]: Without dead ends: 840 [2020-08-21 23:08:43,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-21 23:08:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-21 23:08:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-21 23:08:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-21 23:08:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-21 23:08:43,696 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-21 23:08:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:43,697 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-21 23:08:43,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:08:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-21 23:08:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 23:08:43,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:43,702 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] [2020-08-21 23:08:43,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:08:43,703 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-21 23:08:43,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:43,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654474866] [2020-08-21 23:08:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:08:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:43,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654474866] [2020-08-21 23:08:43,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:43,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:08:43,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751921851] [2020-08-21 23:08:43,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:08:43,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:08:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:08:43,892 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-21 23:08:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:44,803 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-21 23:08:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:08:44,804 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 23:08:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:44,811 INFO L225 Difference]: With dead ends: 1352 [2020-08-21 23:08:44,811 INFO L226 Difference]: Without dead ends: 764 [2020-08-21 23:08:44,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:08:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-21 23:08:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-21 23:08:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-21 23:08:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-21 23:08:44,885 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-21 23:08:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:44,886 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-21 23:08:44,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:08:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-21 23:08:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 23:08:44,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:44,887 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] [2020-08-21 23:08:44,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:08:44,888 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-21 23:08:44,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:44,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998411535] [2020-08-21 23:08:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:08:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:08:45,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998411535] [2020-08-21 23:08:45,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:45,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:08:45,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087115419] [2020-08-21 23:08:45,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:08:45,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:08:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:08:45,053 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-21 23:08:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:45,734 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-21 23:08:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:08:45,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-21 23:08:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:45,742 INFO L225 Difference]: With dead ends: 1262 [2020-08-21 23:08:45,742 INFO L226 Difference]: Without dead ends: 814 [2020-08-21 23:08:45,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:08:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-21 23:08:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-21 23:08:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-21 23:08:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-21 23:08:45,818 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-21 23:08:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:45,818 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-21 23:08:45,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:08:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-21 23:08:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 23:08:45,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:45,822 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 23:08:45,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:08:45,822 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:45,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-21 23:08:45,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:45,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711590115] [2020-08-21 23:08:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 23:08:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:45,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:08:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 23:08:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 23:08:46,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711590115] [2020-08-21 23:08:46,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:08:46,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:08:46,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180576155] [2020-08-21 23:08:46,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:46,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:46,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:46,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:46,019 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-21 23:08:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:48,641 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-21 23:08:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 23:08:48,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-21 23:08:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:48,651 INFO L225 Difference]: With dead ends: 2276 [2020-08-21 23:08:48,651 INFO L226 Difference]: Without dead ends: 1165 [2020-08-21 23:08:48,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 23:08:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-21 23:08:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-21 23:08:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-21 23:08:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-21 23:08:48,760 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-21 23:08:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:48,760 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-21 23:08:48,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-21 23:08:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 23:08:48,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:48,763 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 23:08:48,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:08:48,764 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:48,764 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-21 23:08:48,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:48,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556448938] [2020-08-21 23:08:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:08:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:08:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 23:08:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 23:08:48,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556448938] [2020-08-21 23:08:48,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:48,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:08:48,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717251726] [2020-08-21 23:08:48,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:08:48,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:08:48,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:08:48,941 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-21 23:08:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:49,801 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-21 23:08:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:08:49,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-21 23:08:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:49,810 INFO L225 Difference]: With dead ends: 1198 [2020-08-21 23:08:49,810 INFO L226 Difference]: Without dead ends: 1195 [2020-08-21 23:08:49,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:08:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-21 23:08:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-21 23:08:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-21 23:08:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-21 23:08:49,913 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-21 23:08:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:49,913 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-21 23:08:49,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:08:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-21 23:08:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 23:08:49,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:49,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:49,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:08:49,917 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-21 23:08:49,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:49,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701956905] [2020-08-21 23:08:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:08:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:08:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 23:08:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 23:08:50,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701956905] [2020-08-21 23:08:50,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:08:50,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:08:50,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126653279] [2020-08-21 23:08:50,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:50,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:50,157 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-21 23:08:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:52,328 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-21 23:08:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 23:08:52,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-21 23:08:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:52,346 INFO L225 Difference]: With dead ends: 2245 [2020-08-21 23:08:52,346 INFO L226 Difference]: Without dead ends: 2242 [2020-08-21 23:08:52,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-21 23:08:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-21 23:08:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-21 23:08:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-21 23:08:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-21 23:08:52,717 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-21 23:08:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:52,717 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-21 23:08:52,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-21 23:08:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 23:08:52,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:52,731 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:52,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:08:52,731 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:52,732 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-21 23:08:52,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:52,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816393773] [2020-08-21 23:08:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:08:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:08:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 23:08:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-21 23:08:52,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816393773] [2020-08-21 23:08:52,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:52,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:08:52,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383105166] [2020-08-21 23:08:52,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:08:52,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:08:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:08:52,981 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-21 23:08:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:53,954 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-21 23:08:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:08:53,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-21 23:08:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:53,966 INFO L225 Difference]: With dead ends: 3453 [2020-08-21 23:08:53,966 INFO L226 Difference]: Without dead ends: 1708 [2020-08-21 23:08:53,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-21 23:08:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-21 23:08:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-21 23:08:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-21 23:08:54,299 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-21 23:08:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:54,299 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-21 23:08:54,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:08:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-21 23:08:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 23:08:54,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:54,310 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-08-21 23:08:54,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 23:08:54,311 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-21 23:08:54,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:54,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825594904] [2020-08-21 23:08:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:08:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:08:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:08:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 23:08:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 23:08:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:08:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 23:08:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-21 23:08:54,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825594904] [2020-08-21 23:08:54,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:08:54,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:08:54,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106609120] [2020-08-21 23:08:54,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:08:54,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:54,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:08:54,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:08:54,665 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-21 23:08:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:56,340 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-21 23:08:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 23:08:56,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-21 23:08:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:56,345 INFO L225 Difference]: With dead ends: 1974 [2020-08-21 23:08:56,345 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 23:08:56,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-21 23:08:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 23:08:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 23:08:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 23:08:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 23:08:56,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-21 23:08:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:56,359 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 23:08:56,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:08:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 23:08:56,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 23:08:56,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 23:08:56,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 23:08:56,920 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 23:09:04,791 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 23:09:05,900 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 23:09:07,102 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 23:09:07,384 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-21 23:09:07,501 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 23:09:08,575 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-21 23:09:08,784 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 23:09:10,131 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-21 23:09:10,952 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-21 23:09:11,825 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-21 23:09:12,229 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-21 23:09:13,342 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 23:09:13,468 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-21 23:09:13,608 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 23:09:16,843 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-21 23:09:17,011 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 23:09:17,562 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-21 23:09:17,963 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-21 23:09:18,293 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 23:09:18,492 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 23:09:22,866 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-21 23:09:23,012 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-21 23:09:25,042 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-21 23:09:26,265 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 165 DAG size of output: 101