/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -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 0.1.25-5644d1e-m [2020-08-19 03:43:54,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:43:54,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:43:54,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:43:54,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:43:54,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:43:54,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:43:54,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:43:54,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:43:54,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:43:54,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:43:54,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:43:54,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:43:54,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:43:54,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:43:54,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:43:54,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:43:54,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:43:54,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:43:54,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:43:54,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:43:54,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:43:54,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:43:54,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:43:54,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:43:54,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:43:54,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:43:54,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:43:54,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:43:54,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 03:43:54,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 03:43:54,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 03:43:54,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 03:43:54,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 03:43:54,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 03:43:54,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 03:43:54,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 03:43:54,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 03:43:54,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:43:54,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:43:54,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:43:54,347 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 [2020-08-19 03:43:54,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:43:54,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:43:54,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:43:54,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:43:54,370 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:43:54,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:43:54,371 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:43:54,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:43:54,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:43:54,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:43:54,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:43:54,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:43:54,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:43:54,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:43:54,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:43:54,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:43:54,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:43:54,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:43:54,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:43:54,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:43:54,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:43:54,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:43:54,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:43:54,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:43:54,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:43:54,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:43:54,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:43:54,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:43:54,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:43:54,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:43:54,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:43:54,682 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:43:54,685 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:43:54,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:43:54,687 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:43:54,688 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 03:43:54,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8eb09d7e2/cabee8ab51cf4861a1df86eb34d02ea8/FLAG55fbbc506 [2020-08-19 03:43:55,255 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:43:55,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 03:43:55,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8eb09d7e2/cabee8ab51cf4861a1df86eb34d02ea8/FLAG55fbbc506 [2020-08-19 03:43:55,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8eb09d7e2/cabee8ab51cf4861a1df86eb34d02ea8 [2020-08-19 03:43:55,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:43:55,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:43:55,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:43:55,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:43:55,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:43:55,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:55,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db9ac37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55, skipping insertion in model container [2020-08-19 03:43:55,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:55,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:43:55,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:43:55,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:43:55,848 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:43:55,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:43:55,984 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:43:55,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55 WrapperNode [2020-08-19 03:43:55,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:43:55,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:43:55,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:43:55,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:43:55,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:55,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:56,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:56,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:56,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:56,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:56,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (1/1) ... [2020-08-19 03:43:56,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:43:56,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:43:56,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:43:56,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:43:56,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (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 [2020-08-19 03:43:56,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:43:56,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:43:56,090 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-19 03:43:56,090 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-19 03:43:56,090 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-19 03:43:56,090 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-19 03:43:56,091 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-19 03:43:56,091 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-19 03:43:56,091 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-19 03:43:56,091 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-19 03:43:56,091 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-19 03:43:56,091 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-19 03:43:56,092 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-19 03:43:56,092 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-19 03:43:56,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:43:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:43:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:43:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-19 03:43:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-19 03:43:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-19 03:43:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-19 03:43:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-19 03:43:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-19 03:43:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-19 03:43:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-19 03:43:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-19 03:43:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-19 03:43:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-19 03:43:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-19 03:43:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:43:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:43:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:43:56,471 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:43:56,472 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 03:43:56,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:43:56 BoogieIcfgContainer [2020-08-19 03:43:56,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:43:56,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:43:56,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:43:56,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:43:56,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:43:55" (1/3) ... [2020-08-19 03:43:56,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eec0a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:43:56, skipping insertion in model container [2020-08-19 03:43:56,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:43:55" (2/3) ... [2020-08-19 03:43:56,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eec0a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:43:56, skipping insertion in model container [2020-08-19 03:43:56,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:43:56" (3/3) ... [2020-08-19 03:43:56,486 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-19 03:43:56,496 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:43:56,504 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:43:56,530 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:43:56,557 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:43:56,557 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:43:56,557 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:43:56,557 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:43:56,558 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:43:56,558 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:43:56,558 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:43:56,558 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:43:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-19 03:43:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 03:43:56,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:43:56,593 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] [2020-08-19 03:43:56,593 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:43:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:43:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-19 03:43:56,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:43:56,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997404871] [2020-08-19 03:43:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:43:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:56,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:43:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:43:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:43:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:43:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 03:43:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:43:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:43:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:43:57,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997404871] [2020-08-19 03:43:57,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:43:57,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 03:43:57,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409628585] [2020-08-19 03:43:57,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:43:57,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:43:57,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:43:57,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:43:57,171 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-19 03:43:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:43:58,359 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-19 03:43:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 03:43:58,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-19 03:43:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:43:58,402 INFO L225 Difference]: With dead ends: 356 [2020-08-19 03:43:58,402 INFO L226 Difference]: Without dead ends: 248 [2020-08-19 03:43:58,412 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 [2020-08-19 03:43:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-19 03:43:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-19 03:43:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 03:43:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-19 03:43:58,552 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-19 03:43:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:43:58,554 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-19 03:43:58,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:43:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-19 03:43:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 03:43:58,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:43:58,571 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] [2020-08-19 03:43:58,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:43:58,572 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:43:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:43:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-19 03:43:58,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:43:58,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582104952] [2020-08-19 03:43:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:43:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:43:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:43:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:43:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:43:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 03:43:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:43:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:43:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:43:58,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582104952] [2020-08-19 03:43:58,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:43:58,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 03:43:58,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749439271] [2020-08-19 03:43:58,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 03:43:58,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:43:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 03:43:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 03:43:58,778 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-19 03:43:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:43:59,368 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-19 03:43:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 03:43:59,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-19 03:43:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:43:59,372 INFO L225 Difference]: With dead ends: 406 [2020-08-19 03:43:59,372 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 03:43:59,374 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 [2020-08-19 03:43:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 03:43:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-19 03:43:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-19 03:43:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-19 03:43:59,404 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-19 03:43:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:43:59,404 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-19 03:43:59,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 03:43:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-19 03:43:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 03:43:59,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:43:59,407 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] [2020-08-19 03:43:59,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:43:59,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:43:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:43:59,407 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-19 03:43:59,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:43:59,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613052273] [2020-08-19 03:43:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:43:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:43:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:43:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:43:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:43:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 03:43:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 03:43:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:43:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:43:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:43:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:43:59,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613052273] [2020-08-19 03:43:59,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:43:59,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 03:43:59,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643263302] [2020-08-19 03:43:59,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 03:43:59,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:43:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 03:43:59,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:43:59,674 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-19 03:44:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:00,850 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-19 03:44:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 03:44:00,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-19 03:44:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:00,854 INFO L225 Difference]: With dead ends: 582 [2020-08-19 03:44:00,856 INFO L226 Difference]: Without dead ends: 417 [2020-08-19 03:44:00,857 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 [2020-08-19 03:44:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-19 03:44:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-19 03:44:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-19 03:44:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-19 03:44:00,916 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-19 03:44:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:00,917 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-19 03:44:00,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 03:44:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-19 03:44:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 03:44:00,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:00,919 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] [2020-08-19 03:44:00,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:44:00,919 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-19 03:44:00,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:00,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131120300] [2020-08-19 03:44:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 03:44:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 03:44:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:44:01,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131120300] [2020-08-19 03:44:01,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:01,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-19 03:44:01,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910464969] [2020-08-19 03:44:01,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 03:44:01,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:01,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 03:44:01,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-19 03:44:01,215 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-19 03:44:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:04,115 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-19 03:44:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 03:44:04,116 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-19 03:44:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:04,122 INFO L225 Difference]: With dead ends: 873 [2020-08-19 03:44:04,122 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 03:44:04,125 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 [2020-08-19 03:44:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 03:44:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-19 03:44:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-19 03:44:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-19 03:44:04,171 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-19 03:44:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:04,172 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-19 03:44:04,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 03:44:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-19 03:44:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 03:44:04,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:04,173 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] [2020-08-19 03:44:04,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:44:04,173 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:04,174 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-19 03:44:04,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:04,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834598278] [2020-08-19 03:44:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 03:44:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:44:04,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834598278] [2020-08-19 03:44:04,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:04,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 03:44:04,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989414439] [2020-08-19 03:44:04,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 03:44:04,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 03:44:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:44:04,372 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-19 03:44:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:05,492 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-19 03:44:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 03:44:05,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-19 03:44:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:05,497 INFO L225 Difference]: With dead ends: 612 [2020-08-19 03:44:05,498 INFO L226 Difference]: Without dead ends: 418 [2020-08-19 03:44:05,500 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 [2020-08-19 03:44:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-19 03:44:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-19 03:44:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-19 03:44:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-19 03:44:05,554 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-19 03:44:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:05,555 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-19 03:44:05,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 03:44:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-19 03:44:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 03:44:05,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:05,558 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] [2020-08-19 03:44:05,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:44:05,559 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-19 03:44:05,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:05,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708438902] [2020-08-19 03:44:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 03:44:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:44:05,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708438902] [2020-08-19 03:44:05,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:05,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 03:44:05,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775995522] [2020-08-19 03:44:05,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 03:44:05,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 03:44:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:44:05,773 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-19 03:44:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:06,646 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-19 03:44:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 03:44:06,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 03:44:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:06,655 INFO L225 Difference]: With dead ends: 727 [2020-08-19 03:44:06,655 INFO L226 Difference]: Without dead ends: 421 [2020-08-19 03:44:06,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-19 03:44:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-19 03:44:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-19 03:44:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-19 03:44:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-19 03:44:06,714 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-19 03:44:06,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:06,715 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-19 03:44:06,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 03:44:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-19 03:44:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 03:44:06,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:06,716 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] [2020-08-19 03:44:06,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:44:06,717 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-19 03:44:06,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:06,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871634331] [2020-08-19 03:44:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 03:44:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:44:06,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871634331] [2020-08-19 03:44:06,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:06,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 03:44:06,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981071330] [2020-08-19 03:44:06,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 03:44:06,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 03:44:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:44:06,947 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-19 03:44:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:09,434 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-19 03:44:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 03:44:09,435 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 03:44:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:09,441 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 03:44:09,441 INFO L226 Difference]: Without dead ends: 840 [2020-08-19 03:44:09,444 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 [2020-08-19 03:44:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-19 03:44:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-19 03:44:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-19 03:44:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-19 03:44:09,511 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-19 03:44:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:09,511 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-19 03:44:09,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 03:44:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-19 03:44:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 03:44:09,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:09,513 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] [2020-08-19 03:44:09,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:44:09,513 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-19 03:44:09,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:09,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273709969] [2020-08-19 03:44:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 03:44:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:44:09,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273709969] [2020-08-19 03:44:09,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:09,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 03:44:09,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673032801] [2020-08-19 03:44:09,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 03:44:09,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:09,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 03:44:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:44:09,696 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-19 03:44:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:10,592 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-19 03:44:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 03:44:10,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 03:44:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:10,600 INFO L225 Difference]: With dead ends: 1352 [2020-08-19 03:44:10,600 INFO L226 Difference]: Without dead ends: 764 [2020-08-19 03:44:10,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:44:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-19 03:44:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-19 03:44:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-19 03:44:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-19 03:44:10,682 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-19 03:44:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:10,682 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-19 03:44:10,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 03:44:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-19 03:44:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 03:44:10,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:10,684 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] [2020-08-19 03:44:10,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:44:10,684 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-19 03:44:10,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:10,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260227669] [2020-08-19 03:44:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 03:44:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:44:10,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260227669] [2020-08-19 03:44:10,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:10,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 03:44:10,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558037827] [2020-08-19 03:44:10,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:44:10,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:44:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:44:10,853 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-19 03:44:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:11,543 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-19 03:44:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 03:44:11,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-19 03:44:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:11,550 INFO L225 Difference]: With dead ends: 1262 [2020-08-19 03:44:11,550 INFO L226 Difference]: Without dead ends: 814 [2020-08-19 03:44:11,552 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 [2020-08-19 03:44:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-19 03:44:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-19 03:44:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-19 03:44:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-19 03:44:11,616 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-19 03:44:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:11,617 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-19 03:44:11,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:44:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-19 03:44:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 03:44:11,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:11,619 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] [2020-08-19 03:44:11,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:44:11,619 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-19 03:44:11,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:11,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937638585] [2020-08-19 03:44:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 03:44:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:44:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 03:44:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 03:44:11,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937638585] [2020-08-19 03:44:11,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:44:11,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 03:44:11,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586592028] [2020-08-19 03:44:11,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:44:11,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:44:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:44:11,824 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-19 03:44:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:14,462 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-19 03:44:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 03:44:14,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-19 03:44:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:14,471 INFO L225 Difference]: With dead ends: 2276 [2020-08-19 03:44:14,471 INFO L226 Difference]: Without dead ends: 1165 [2020-08-19 03:44:14,477 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 [2020-08-19 03:44:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-19 03:44:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-19 03:44:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-19 03:44:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-19 03:44:14,579 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-19 03:44:14,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:14,579 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-19 03:44:14,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:44:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-19 03:44:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 03:44:14,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:14,582 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] [2020-08-19 03:44:14,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:44:14,583 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:14,583 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-19 03:44:14,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:14,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843285917] [2020-08-19 03:44:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 03:44:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 03:44:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 03:44:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 03:44:14,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843285917] [2020-08-19 03:44:14,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:14,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 03:44:14,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909335796] [2020-08-19 03:44:14,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 03:44:14,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 03:44:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:44:14,771 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-19 03:44:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:15,627 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-19 03:44:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 03:44:15,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-19 03:44:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:15,634 INFO L225 Difference]: With dead ends: 1198 [2020-08-19 03:44:15,634 INFO L226 Difference]: Without dead ends: 1195 [2020-08-19 03:44:15,635 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 [2020-08-19 03:44:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-19 03:44:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-19 03:44:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-19 03:44:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-19 03:44:15,741 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-19 03:44:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:15,741 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-19 03:44:15,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 03:44:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-19 03:44:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-19 03:44:15,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:15,745 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] [2020-08-19 03:44:15,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 03:44:15,745 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:15,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-19 03:44:15,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:15,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352383283] [2020-08-19 03:44:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 03:44:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 03:44:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 03:44:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 03:44:15,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352383283] [2020-08-19 03:44:15,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:44:15,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 03:44:15,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178818560] [2020-08-19 03:44:15,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:44:15,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:15,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:44:15,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:44:15,959 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-19 03:44:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:18,069 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-19 03:44:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:44:18,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-19 03:44:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:18,091 INFO L225 Difference]: With dead ends: 2245 [2020-08-19 03:44:18,091 INFO L226 Difference]: Without dead ends: 2242 [2020-08-19 03:44:18,093 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 [2020-08-19 03:44:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-19 03:44:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-19 03:44:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-19 03:44:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-19 03:44:18,385 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-19 03:44:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:18,386 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-19 03:44:18,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:44:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-19 03:44:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-19 03:44:18,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:18,402 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] [2020-08-19 03:44:18,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 03:44:18,403 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:18,404 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-19 03:44:18,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:18,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084305803] [2020-08-19 03:44:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 03:44:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 03:44:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 03:44:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 03:44:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-19 03:44:18,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084305803] [2020-08-19 03:44:18,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:44:18,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 03:44:18,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547544674] [2020-08-19 03:44:18,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 03:44:18,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:18,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 03:44:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 03:44:18,620 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-19 03:44:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:19,369 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-19 03:44:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 03:44:19,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-19 03:44:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:19,382 INFO L225 Difference]: With dead ends: 3453 [2020-08-19 03:44:19,383 INFO L226 Difference]: Without dead ends: 1708 [2020-08-19 03:44:19,397 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 [2020-08-19 03:44:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-19 03:44:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-19 03:44:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-19 03:44:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-19 03:44:19,623 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-19 03:44:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:19,624 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-19 03:44:19,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 03:44:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-19 03:44:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-19 03:44:19,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:44:19,632 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] [2020-08-19 03:44:19,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 03:44:19,632 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:44:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:44:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-19 03:44:19,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:44:19,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137193979] [2020-08-19 03:44:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:44:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:44:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 03:44:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 03:44:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:44:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 03:44:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 03:44:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 03:44:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 03:44:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:44:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-19 03:44:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 03:44:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:44:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:44:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-19 03:44:19,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137193979] [2020-08-19 03:44:19,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:44:19,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 03:44:19,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316274158] [2020-08-19 03:44:19,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 03:44:19,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:44:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 03:44:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 03:44:19,935 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-19 03:44:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:44:21,785 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-19 03:44:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:44:21,788 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-19 03:44:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:44:21,789 INFO L225 Difference]: With dead ends: 1974 [2020-08-19 03:44:21,790 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 03:44:21,803 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 [2020-08-19 03:44:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 03:44:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 03:44:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 03:44:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 03:44:21,805 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-19 03:44:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:44:21,805 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 03:44:21,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 03:44:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 03:44:21,805 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 03:44:21,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 03:44:21,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 03:44:22,325 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 03:44:29,821 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 03:44:30,930 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 03:44:32,177 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 03:44:32,447 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-19 03:44:32,563 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 03:44:33,604 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-19 03:44:33,794 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 03:44:35,126 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-19 03:44:35,993 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-19 03:44:36,835 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-19 03:44:37,245 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-19 03:44:38,368 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 03:44:38,499 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-19 03:44:38,651 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 03:44:41,983 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-19 03:44:42,162 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 03:44:42,698 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-19 03:44:43,094 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-19 03:44:43,423 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 03:44:43,618 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 03:44:48,037 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-19 03:44:48,191 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-19 03:44:50,246 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-19 03:44:51,428 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-19 03:44:52,774 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-19 03:44:52,942 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46