/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:37:25,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:37:25,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:37:25,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:37:25,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:37:25,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:37:25,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:37:25,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:37:25,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:37:25,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:37:25,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:37:25,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:37:25,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:37:25,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:37:25,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:37:25,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:37:25,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:37:25,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:37:25,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:37:25,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:37:25,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:37:25,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:37:25,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:37:25,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:37:25,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:37:25,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:37:25,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:37:25,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:37:25,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:37:25,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:37:25,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:37:25,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:37:25,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:37:25,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:37:25,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:37:25,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:37:25,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:37:25,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:37:25,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:37:25,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:37:25,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:37:25,897 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 [2020-08-22 05:37:25,941 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:37:25,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:37:25,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:37:25,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:37:25,945 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:37:25,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:37:25,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:37:25,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:37:25,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:37:25,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:37:25,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:37:25,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:37:25,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:37:25,950 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:37:25,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:37:25,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:37:25,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:37:25,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:37:25,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:37:25,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:37:25,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:37:25,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:37:25,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:37:25,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:37:25,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:37:25,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:37:25,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:37:25,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:37:25,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:37:25,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:37:26,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:37:26,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:37:26,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:37:26,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:37:26,288 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:37:26,289 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-22 05:37:26,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a042614ae/e14d407da958486b8ef98bc0edea00c1/FLAGfcb1440ae [2020-08-22 05:37:26,824 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:37:26,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-22 05:37:26,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a042614ae/e14d407da958486b8ef98bc0edea00c1/FLAGfcb1440ae [2020-08-22 05:37:27,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a042614ae/e14d407da958486b8ef98bc0edea00c1 [2020-08-22 05:37:27,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:37:27,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:37:27,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:37:27,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:37:27,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:37:27,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67eb611c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27, skipping insertion in model container [2020-08-22 05:37:27,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:37:27,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:37:27,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:37:27,472 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:37:27,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:37:27,571 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:37:27,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27 WrapperNode [2020-08-22 05:37:27,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:37:27,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:37:27,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:37:27,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:37:27,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (1/1) ... [2020-08-22 05:37:27,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:37:27,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:37:27,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:37:27,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:37:27,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (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 [2020-08-22 05:37:27,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:37:27,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:37:27,784 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-22 05:37:27,784 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-22 05:37:27,784 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-22 05:37:27,784 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-22 05:37:27,784 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-22 05:37:27,784 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-22 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-22 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-22 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-22 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-22 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-22 05:37:27,785 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-22 05:37:27,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:37:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:37:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:37:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-22 05:37:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-22 05:37:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-22 05:37:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-22 05:37:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-22 05:37:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-22 05:37:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-22 05:37:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-22 05:37:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-22 05:37:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-22 05:37:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-22 05:37:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-22 05:37:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:37:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:37:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:37:28,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:37:28,258 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 05:37:28,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:37:28 BoogieIcfgContainer [2020-08-22 05:37:28,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:37:28,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:37:28,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:37:28,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:37:28,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:37:27" (1/3) ... [2020-08-22 05:37:28,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ff6e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:37:28, skipping insertion in model container [2020-08-22 05:37:28,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:27" (2/3) ... [2020-08-22 05:37:28,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ff6e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:37:28, skipping insertion in model container [2020-08-22 05:37:28,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:37:28" (3/3) ... [2020-08-22 05:37:28,278 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-22 05:37:28,291 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:37:28,300 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:37:28,314 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:37:28,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:37:28,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:37:28,342 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:37:28,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:37:28,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:37:28,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:37:28,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:37:28,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:37:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-22 05:37:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 05:37:28,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:28,377 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] [2020-08-22 05:37:28,377 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:28,383 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-22 05:37:28,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:28,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845620523] [2020-08-22 05:37:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 05:37:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:28,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845620523] [2020-08-22 05:37:28,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:28,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:37:28,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483651533] [2020-08-22 05:37:28,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:37:28,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:37:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:37:28,900 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-22 05:37:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:29,989 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-22 05:37:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:37:29,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-22 05:37:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:30,010 INFO L225 Difference]: With dead ends: 356 [2020-08-22 05:37:30,011 INFO L226 Difference]: Without dead ends: 248 [2020-08-22 05:37:30,016 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 [2020-08-22 05:37:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-22 05:37:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-22 05:37:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 05:37:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-22 05:37:30,108 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-22 05:37:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:30,109 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-22 05:37:30,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:37:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-22 05:37:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 05:37:30,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:30,115 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] [2020-08-22 05:37:30,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:37:30,116 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:30,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-22 05:37:30,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:30,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276736639] [2020-08-22 05:37:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:37:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:30,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276736639] [2020-08-22 05:37:30,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:30,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 05:37:30,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749413940] [2020-08-22 05:37:30,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:37:30,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:37:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:37:30,311 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-22 05:37:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:30,940 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-22 05:37:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:37:30,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-22 05:37:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:30,945 INFO L225 Difference]: With dead ends: 406 [2020-08-22 05:37:30,945 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 05:37:30,947 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 [2020-08-22 05:37:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 05:37:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-22 05:37:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-22 05:37:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-22 05:37:31,008 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-22 05:37:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:31,008 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-22 05:37:31,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:37:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-22 05:37:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 05:37:31,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:31,020 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] [2020-08-22 05:37:31,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:37:31,022 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:31,023 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-22 05:37:31,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:31,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326680240] [2020-08-22 05:37:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:37:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 05:37:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:31,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326680240] [2020-08-22 05:37:31,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:31,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 05:37:31,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306354651] [2020-08-22 05:37:31,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:37:31,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:37:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:37:31,323 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-22 05:37:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:32,497 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-22 05:37:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 05:37:32,499 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-22 05:37:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:32,507 INFO L225 Difference]: With dead ends: 582 [2020-08-22 05:37:32,507 INFO L226 Difference]: Without dead ends: 417 [2020-08-22 05:37:32,510 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 [2020-08-22 05:37:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-22 05:37:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-22 05:37:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-22 05:37:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-22 05:37:32,595 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-22 05:37:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:32,597 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-22 05:37:32,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:37:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-22 05:37:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 05:37:32,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:32,601 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] [2020-08-22 05:37:32,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:37:32,601 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-22 05:37:32,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:32,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651947710] [2020-08-22 05:37:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:37:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 05:37:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:32,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651947710] [2020-08-22 05:37:32,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:32,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 05:37:32,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75764776] [2020-08-22 05:37:32,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:37:32,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:37:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:37:32,856 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-22 05:37:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:35,696 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-22 05:37:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 05:37:35,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-22 05:37:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:35,702 INFO L225 Difference]: With dead ends: 873 [2020-08-22 05:37:35,703 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 05:37:35,713 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 [2020-08-22 05:37:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 05:37:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-22 05:37:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-22 05:37:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-22 05:37:35,792 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-22 05:37:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:35,794 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-22 05:37:35,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:37:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-22 05:37:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 05:37:35,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:35,797 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] [2020-08-22 05:37:35,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:37:35,806 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-22 05:37:35,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:35,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627898569] [2020-08-22 05:37:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:35,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:35,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:35,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:36,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:36,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:37:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:36,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:36,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:36,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627898569] [2020-08-22 05:37:36,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:36,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 05:37:36,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953877336] [2020-08-22 05:37:36,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:37:36,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:37:36,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:37:36,061 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-22 05:37:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:37,249 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-22 05:37:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:37:37,250 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-22 05:37:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:37,254 INFO L225 Difference]: With dead ends: 612 [2020-08-22 05:37:37,255 INFO L226 Difference]: Without dead ends: 418 [2020-08-22 05:37:37,257 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 [2020-08-22 05:37:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-22 05:37:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-22 05:37:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 05:37:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-22 05:37:37,306 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-22 05:37:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:37,307 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-22 05:37:37,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:37:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-22 05:37:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 05:37:37,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:37,308 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] [2020-08-22 05:37:37,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:37:37,309 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:37,309 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-22 05:37:37,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:37,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752171299] [2020-08-22 05:37:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:37:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:37,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752171299] [2020-08-22 05:37:37,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:37,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 05:37:37,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667188148] [2020-08-22 05:37:37,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:37:37,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:37,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:37:37,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:37:37,518 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-22 05:37:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:38,397 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-22 05:37:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:37:38,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 05:37:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:38,403 INFO L225 Difference]: With dead ends: 727 [2020-08-22 05:37:38,403 INFO L226 Difference]: Without dead ends: 421 [2020-08-22 05:37:38,406 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 [2020-08-22 05:37:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-22 05:37:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-22 05:37:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-22 05:37:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-22 05:37:38,449 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-22 05:37:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:38,449 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-22 05:37:38,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:37:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-22 05:37:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 05:37:38,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:38,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:37:38,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:37:38,452 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-22 05:37:38,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:38,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645844176] [2020-08-22 05:37:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:37:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:38,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645844176] [2020-08-22 05:37:38,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:38,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 05:37:38,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533772356] [2020-08-22 05:37:38,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:37:38,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:38,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:37:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:37:38,658 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-22 05:37:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:41,333 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-22 05:37:41,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 05:37:41,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 05:37:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:41,345 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 05:37:41,346 INFO L226 Difference]: Without dead ends: 840 [2020-08-22 05:37:41,350 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 [2020-08-22 05:37:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-22 05:37:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-22 05:37:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-22 05:37:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-22 05:37:41,463 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-22 05:37:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:41,464 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-22 05:37:41,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:37:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-22 05:37:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 05:37:41,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:41,466 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] [2020-08-22 05:37:41,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:37:41,466 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:41,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-22 05:37:41,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:41,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931837397] [2020-08-22 05:37:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:37:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:41,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931837397] [2020-08-22 05:37:41,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:41,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 05:37:41,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838408201] [2020-08-22 05:37:41,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:37:41,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:41,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:37:41,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:37:41,649 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-22 05:37:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:42,501 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-22 05:37:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:37:42,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 05:37:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:42,507 INFO L225 Difference]: With dead ends: 1352 [2020-08-22 05:37:42,507 INFO L226 Difference]: Without dead ends: 764 [2020-08-22 05:37:42,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:37:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-22 05:37:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-22 05:37:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-22 05:37:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-22 05:37:42,598 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-22 05:37:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:42,599 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-22 05:37:42,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:37:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-22 05:37:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 05:37:42,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:42,600 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] [2020-08-22 05:37:42,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:37:42,601 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-22 05:37:42,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:42,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167091433] [2020-08-22 05:37:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:37:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:42,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167091433] [2020-08-22 05:37:42,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:42,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:37:42,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414431192] [2020-08-22 05:37:42,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:37:42,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:42,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:37:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:37:42,750 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-22 05:37:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:43,413 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-22 05:37:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:37:43,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-22 05:37:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:43,419 INFO L225 Difference]: With dead ends: 1262 [2020-08-22 05:37:43,419 INFO L226 Difference]: Without dead ends: 814 [2020-08-22 05:37:43,422 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 [2020-08-22 05:37:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-22 05:37:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-22 05:37:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-22 05:37:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-22 05:37:43,501 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-22 05:37:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:43,502 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-22 05:37:43,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:37:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-22 05:37:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 05:37:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:43,504 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] [2020-08-22 05:37:43,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:37:43,505 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-22 05:37:43,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:43,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324601052] [2020-08-22 05:37:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 05:37:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 05:37:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 05:37:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 05:37:43,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324601052] [2020-08-22 05:37:43,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:37:43,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:37:43,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907661653] [2020-08-22 05:37:43,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:37:43,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:37:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:37:43,680 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-22 05:37:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:46,254 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-22 05:37:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 05:37:46,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-22 05:37:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:46,266 INFO L225 Difference]: With dead ends: 2276 [2020-08-22 05:37:46,266 INFO L226 Difference]: Without dead ends: 1165 [2020-08-22 05:37:46,274 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 [2020-08-22 05:37:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-22 05:37:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-22 05:37:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-22 05:37:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-22 05:37:46,395 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-22 05:37:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:46,396 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-22 05:37:46,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:37:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-22 05:37:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 05:37:46,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:46,402 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] [2020-08-22 05:37:46,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:37:46,402 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:46,403 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-22 05:37:46,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:46,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818841426] [2020-08-22 05:37:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:37:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 05:37:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 05:37:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 05:37:46,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818841426] [2020-08-22 05:37:46,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:46,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 05:37:46,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097645945] [2020-08-22 05:37:46,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:37:46,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:46,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:37:46,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:37:46,597 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-22 05:37:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:47,410 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-22 05:37:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:37:47,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-22 05:37:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:47,418 INFO L225 Difference]: With dead ends: 1198 [2020-08-22 05:37:47,418 INFO L226 Difference]: Without dead ends: 1195 [2020-08-22 05:37:47,420 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 [2020-08-22 05:37:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-22 05:37:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-22 05:37:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-22 05:37:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-22 05:37:47,536 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-22 05:37:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:47,537 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-22 05:37:47,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:37:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-22 05:37:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 05:37:47,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:47,540 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] [2020-08-22 05:37:47,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:37:47,541 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-22 05:37:47,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:47,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47724727] [2020-08-22 05:37:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:37:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 05:37:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 05:37:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 05:37:47,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47724727] [2020-08-22 05:37:47,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:37:47,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:37:47,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667844768] [2020-08-22 05:37:47,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:37:47,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:37:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:37:47,801 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-22 05:37:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:49,921 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-22 05:37:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 05:37:49,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-22 05:37:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:49,938 INFO L225 Difference]: With dead ends: 2245 [2020-08-22 05:37:49,938 INFO L226 Difference]: Without dead ends: 2242 [2020-08-22 05:37:49,940 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 [2020-08-22 05:37:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-22 05:37:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-22 05:37:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-22 05:37:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-22 05:37:50,223 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-22 05:37:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:50,224 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-22 05:37:50,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:37:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-22 05:37:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-22 05:37:50,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:50,235 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] [2020-08-22 05:37:50,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 05:37:50,235 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:50,235 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-22 05:37:50,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:50,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916565745] [2020-08-22 05:37:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:37:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 05:37:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 05:37:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 05:37:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-22 05:37:50,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916565745] [2020-08-22 05:37:50,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:50,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 05:37:50,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968579883] [2020-08-22 05:37:50,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:37:50,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:37:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:37:50,455 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-22 05:37:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:51,233 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-22 05:37:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:37:51,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-22 05:37:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:51,249 INFO L225 Difference]: With dead ends: 3453 [2020-08-22 05:37:51,249 INFO L226 Difference]: Without dead ends: 1708 [2020-08-22 05:37:51,265 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 [2020-08-22 05:37:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-22 05:37:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-22 05:37:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-22 05:37:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-22 05:37:51,493 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-22 05:37:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:51,493 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-22 05:37:51,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:37:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-22 05:37:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 05:37:51,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:51,499 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] [2020-08-22 05:37:51,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 05:37:51,500 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:51,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-22 05:37:51,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:51,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219422458] [2020-08-22 05:37:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:37:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:37:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:37:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:37:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 05:37:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 05:37:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 05:37:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:37:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 05:37:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:37:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:37:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-22 05:37:51,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219422458] [2020-08-22 05:37:51,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:37:51,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 05:37:51,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575354784] [2020-08-22 05:37:51,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 05:37:51,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 05:37:51,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:37:51,754 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-22 05:37:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:53,403 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-22 05:37:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 05:37:53,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-22 05:37:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:53,406 INFO L225 Difference]: With dead ends: 1974 [2020-08-22 05:37:53,406 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 05:37:53,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-22 05:37:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 05:37:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 05:37:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 05:37:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 05:37:53,419 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-22 05:37:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:53,420 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 05:37:53,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 05:37:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 05:37:53,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 05:37:53,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 05:37:53,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 05:37:53,924 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-22 05:38:00,349 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2020-08-22 05:38:01,552 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 05:38:02,628 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 05:38:03,793 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 05:38:04,067 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-22 05:38:04,183 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-22 05:38:05,186 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-22 05:38:05,378 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 05:38:06,745 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-22 05:38:07,531 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-22 05:38:08,339 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-22 05:38:08,755 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-22 05:38:09,875 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 05:38:10,008 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-22 05:38:10,153 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-22 05:38:13,415 WARN L193 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-22 05:38:13,603 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-22 05:38:14,162 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-22 05:38:14,559 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-22 05:38:14,907 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 05:38:15,103 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 05:38:19,485 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-22 05:38:19,629 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-22 05:38:21,639 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-22 05:38:22,818 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-22 05:38:24,162 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-22 05:38:24,333 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46