/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:37:38,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:37:38,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:37:38,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:37:38,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:37:38,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:37:38,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:37:38,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:37:38,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:37:38,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:37:38,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:37:38,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:37:38,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:37:38,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:37:38,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:37:38,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:37:38,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:37:38,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:37:38,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:37:38,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:37:38,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:37:38,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:37:38,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:37:38,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:37:38,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 15:37:38,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 15:37:38,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 15:37:38,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 15:37:38,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 15:37:38,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 15:37:38,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 15:37:38,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 15:37:38,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 15:37:38,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 15:37:38,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 15:37:38,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 15:37:38,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 15:37:38,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 15:37:38,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:37:38,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:37:38,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:37:38,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:37:38,955 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:37:38,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:37:38,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:37:38,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:37:38,958 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:37:38,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:37:38,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:37:38,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:37:38,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:37:38,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:37:38,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:37:38,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:37:38,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:37:38,961 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:37:38,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:37:38,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:37:38,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:37:38,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:37:38,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:37:38,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:37:38,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:37:38,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:37:38,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:37:38,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:37:38,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:37:38,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:37:38,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:37:38,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:37:38,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:37:38,965 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 -> false [2020-08-18 15:37:39,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:37:39,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:37:39,272 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:37:39,274 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:37:39,274 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:37:39,275 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 15:37:39,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bfbcaf5fa/2f88e792ba1b4af8baac6653bdc60040/FLAGd05baff1f [2020-08-18 15:37:39,784 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:37:39,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 15:37:39,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bfbcaf5fa/2f88e792ba1b4af8baac6653bdc60040/FLAGd05baff1f [2020-08-18 15:37:40,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bfbcaf5fa/2f88e792ba1b4af8baac6653bdc60040 [2020-08-18 15:37:40,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:37:40,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:37:40,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:37:40,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:37:40,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:37:40,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159a218f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40, skipping insertion in model container [2020-08-18 15:37:40,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:37:40,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:37:40,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:37:40,513 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:37:40,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:37:40,695 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:37:40,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40 WrapperNode [2020-08-18 15:37:40,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:37:40,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:37:40,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:37:40,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:37:40,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... [2020-08-18 15:37:40,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:37:40,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:37:40,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:37:40,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:37:40,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:37:40,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:37:40,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:37:40,822 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 15:37:40,822 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 15:37:40,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 15:37:40,823 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 15:37:40,823 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 15:37:40,823 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 15:37:40,824 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 15:37:40,824 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 15:37:40,824 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 15:37:40,824 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 15:37:40,825 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 15:37:40,825 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 15:37:40,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:37:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:37:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:37:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 15:37:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 15:37:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 15:37:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 15:37:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 15:37:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 15:37:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:37:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:37:41,212 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:37:41,212 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 15:37:41,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:37:41 BoogieIcfgContainer [2020-08-18 15:37:41,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:37:41,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:37:41,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:37:41,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:37:41,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:37:40" (1/3) ... [2020-08-18 15:37:41,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c792f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:37:41, skipping insertion in model container [2020-08-18 15:37:41,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:37:40" (2/3) ... [2020-08-18 15:37:41,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c792f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:37:41, skipping insertion in model container [2020-08-18 15:37:41,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:37:41" (3/3) ... [2020-08-18 15:37:41,229 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-18 15:37:41,241 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:37:41,250 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:37:41,267 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:37:41,300 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:37:41,300 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:37:41,300 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:37:41,301 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:37:41,301 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:37:41,301 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:37:41,301 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:37:41,302 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:37:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-18 15:37:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 15:37:41,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:41,344 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] [2020-08-18 15:37:41,344 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-18 15:37:41,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:41,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487315510] [2020-08-18 15:37:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 15:37:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:41,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487315510] [2020-08-18 15:37:41,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:41,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 15:37:41,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275557691] [2020-08-18 15:37:41,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:37:41,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:41,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:37:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:37:41,976 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-18 15:37:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:43,058 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-18 15:37:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:37:43,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-18 15:37:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:43,099 INFO L225 Difference]: With dead ends: 356 [2020-08-18 15:37:43,099 INFO L226 Difference]: Without dead ends: 248 [2020-08-18 15:37:43,109 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 [2020-08-18 15:37:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-18 15:37:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-18 15:37:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 15:37:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-18 15:37:43,249 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-18 15:37:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:43,251 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-18 15:37:43,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:37:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-18 15:37:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 15:37:43,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:43,266 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] [2020-08-18 15:37:43,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:37:43,267 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-18 15:37:43,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:43,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106290393] [2020-08-18 15:37:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:37:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:43,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106290393] [2020-08-18 15:37:43,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:43,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 15:37:43,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361396414] [2020-08-18 15:37:43,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:37:43,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:43,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:37:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:37:43,566 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-18 15:37:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:44,305 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-18 15:37:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:37:44,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-18 15:37:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:44,309 INFO L225 Difference]: With dead ends: 406 [2020-08-18 15:37:44,310 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 15:37:44,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:37:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 15:37:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-18 15:37:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 15:37:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-18 15:37:44,341 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-18 15:37:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:44,342 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-18 15:37:44,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:37:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-18 15:37:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 15:37:44,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:44,344 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] [2020-08-18 15:37:44,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:37:44,345 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:44,345 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-18 15:37:44,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:44,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235051056] [2020-08-18 15:37:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 15:37:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 15:37:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:44,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235051056] [2020-08-18 15:37:44,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:44,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 15:37:44,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407296221] [2020-08-18 15:37:44,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:37:44,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:37:44,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:37:44,663 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-18 15:37:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:45,982 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-18 15:37:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 15:37:45,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-18 15:37:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:45,987 INFO L225 Difference]: With dead ends: 582 [2020-08-18 15:37:45,988 INFO L226 Difference]: Without dead ends: 417 [2020-08-18 15:37:45,989 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 [2020-08-18 15:37:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-18 15:37:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-18 15:37:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-18 15:37:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-18 15:37:46,051 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-18 15:37:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:46,052 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-18 15:37:46,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:37:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-18 15:37:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 15:37:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:46,054 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] [2020-08-18 15:37:46,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:37:46,055 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-18 15:37:46,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:46,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649798363] [2020-08-18 15:37:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 15:37:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 15:37:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:46,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649798363] [2020-08-18 15:37:46,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:46,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 15:37:46,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499542452] [2020-08-18 15:37:46,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:37:46,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:46,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:37:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:37:46,294 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-18 15:37:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:49,321 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-18 15:37:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 15:37:49,322 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-18 15:37:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:49,332 INFO L225 Difference]: With dead ends: 873 [2020-08-18 15:37:49,332 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 15:37:49,335 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 [2020-08-18 15:37:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 15:37:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-18 15:37:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-18 15:37:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-18 15:37:49,376 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-18 15:37:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:49,376 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-18 15:37:49,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:37:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-18 15:37:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 15:37:49,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:49,378 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] [2020-08-18 15:37:49,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:37:49,378 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:49,379 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-18 15:37:49,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:49,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750902295] [2020-08-18 15:37:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:37:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:49,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750902295] [2020-08-18 15:37:49,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:49,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 15:37:49,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104024061] [2020-08-18 15:37:49,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:37:49,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:37:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:37:49,608 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-18 15:37:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:50,691 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-18 15:37:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:37:50,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-18 15:37:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:50,696 INFO L225 Difference]: With dead ends: 612 [2020-08-18 15:37:50,697 INFO L226 Difference]: Without dead ends: 418 [2020-08-18 15:37:50,699 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 [2020-08-18 15:37:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-18 15:37:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-18 15:37:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 15:37:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-18 15:37:50,745 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-18 15:37:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:50,746 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-18 15:37:50,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:37:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-18 15:37:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 15:37:50,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:50,748 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] [2020-08-18 15:37:50,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:37:50,748 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-18 15:37:50,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:50,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166371275] [2020-08-18 15:37:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:37:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:50,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166371275] [2020-08-18 15:37:50,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:50,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 15:37:50,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042294161] [2020-08-18 15:37:50,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:37:50,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:37:50,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:37:50,975 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-18 15:37:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:51,822 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-18 15:37:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:37:51,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 15:37:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:51,826 INFO L225 Difference]: With dead ends: 727 [2020-08-18 15:37:51,827 INFO L226 Difference]: Without dead ends: 421 [2020-08-18 15:37:51,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:37:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-18 15:37:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-18 15:37:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-18 15:37:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-18 15:37:51,869 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-18 15:37:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:51,870 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-18 15:37:51,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:37:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-18 15:37:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 15:37:51,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:51,871 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] [2020-08-18 15:37:51,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:37:51,872 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:51,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-18 15:37:51,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:51,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980864147] [2020-08-18 15:37:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:51,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:52,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:52,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:52,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:52,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:37:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:52,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:52,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:52,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980864147] [2020-08-18 15:37:52,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:52,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 15:37:52,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878090447] [2020-08-18 15:37:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:37:52,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:37:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:37:52,111 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-18 15:37:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:54,758 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-18 15:37:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 15:37:54,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 15:37:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:54,769 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 15:37:54,769 INFO L226 Difference]: Without dead ends: 840 [2020-08-18 15:37:54,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-18 15:37:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-18 15:37:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-18 15:37:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-18 15:37:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-18 15:37:54,853 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-18 15:37:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:54,854 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-18 15:37:54,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:37:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-18 15:37:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 15:37:54,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:54,871 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] [2020-08-18 15:37:54,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:37:54,871 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-18 15:37:54,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:54,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849927888] [2020-08-18 15:37:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:54,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:54,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:54,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:54,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:54,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:37:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:54,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:55,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:55,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849927888] [2020-08-18 15:37:55,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:55,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 15:37:55,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305084456] [2020-08-18 15:37:55,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:37:55,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:55,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:37:55,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:37:55,033 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-18 15:37:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:55,926 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-18 15:37:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:37:55,926 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 15:37:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:55,935 INFO L225 Difference]: With dead ends: 1352 [2020-08-18 15:37:55,935 INFO L226 Difference]: Without dead ends: 764 [2020-08-18 15:37:55,939 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 [2020-08-18 15:37:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-18 15:37:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-18 15:37:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-18 15:37:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-18 15:37:56,024 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-18 15:37:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:56,025 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-18 15:37:56,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:37:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-18 15:37:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 15:37:56,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:56,027 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] [2020-08-18 15:37:56,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:37:56,027 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-18 15:37:56,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:56,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578131549] [2020-08-18 15:37:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:37:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:37:56,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578131549] [2020-08-18 15:37:56,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:56,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 15:37:56,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970918259] [2020-08-18 15:37:56,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:37:56,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:37:56,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:37:56,184 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-18 15:37:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:56,833 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-18 15:37:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:37:56,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-18 15:37:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:56,839 INFO L225 Difference]: With dead ends: 1262 [2020-08-18 15:37:56,839 INFO L226 Difference]: Without dead ends: 814 [2020-08-18 15:37:56,842 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 [2020-08-18 15:37:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-18 15:37:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-18 15:37:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-18 15:37:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-18 15:37:56,926 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-18 15:37:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:56,926 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-18 15:37:56,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:37:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-18 15:37:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 15:37:56,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:56,929 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] [2020-08-18 15:37:56,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:37:56,929 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:56,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-18 15:37:56,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:56,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911801891] [2020-08-18 15:37:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 15:37:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 15:37:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 15:37:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 15:37:57,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911801891] [2020-08-18 15:37:57,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:37:57,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:37:57,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182520111] [2020-08-18 15:37:57,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:37:57,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:57,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:37:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:37:57,096 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-18 15:37:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:37:59,664 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-18 15:37:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 15:37:59,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-18 15:37:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:37:59,676 INFO L225 Difference]: With dead ends: 2276 [2020-08-18 15:37:59,676 INFO L226 Difference]: Without dead ends: 1165 [2020-08-18 15:37:59,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 15:37:59,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-18 15:37:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-18 15:37:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-18 15:37:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-18 15:37:59,795 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-18 15:37:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:37:59,795 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-18 15:37:59,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:37:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-18 15:37:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 15:37:59,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:37:59,798 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] [2020-08-18 15:37:59,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:37:59,799 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:37:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:37:59,799 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-18 15:37:59,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:37:59,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029033260] [2020-08-18 15:37:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:37:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:37:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:37:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:37:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:37:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 15:37:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 15:37:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 15:37:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:37:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:37:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:37:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 15:37:59,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029033260] [2020-08-18 15:37:59,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:37:59,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 15:37:59,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831102614] [2020-08-18 15:37:59,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:37:59,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:37:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:37:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:37:59,984 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-18 15:38:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:38:00,923 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-18 15:38:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:38:00,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-18 15:38:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:38:00,931 INFO L225 Difference]: With dead ends: 1198 [2020-08-18 15:38:00,931 INFO L226 Difference]: Without dead ends: 1195 [2020-08-18 15:38:00,932 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 [2020-08-18 15:38:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-18 15:38:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-18 15:38:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-18 15:38:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-18 15:38:01,046 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-18 15:38:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:38:01,046 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-18 15:38:01,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:38:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-18 15:38:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 15:38:01,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:38:01,049 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] [2020-08-18 15:38:01,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:38:01,050 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:38:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:38:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-18 15:38:01,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:38:01,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056679209] [2020-08-18 15:38:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:38:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:38:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:38:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:38:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:38:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 15:38:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 15:38:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 15:38:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 15:38:01,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056679209] [2020-08-18 15:38:01,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:38:01,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:38:01,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669914510] [2020-08-18 15:38:01,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:38:01,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:38:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:38:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:38:01,339 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-18 15:38:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:38:03,506 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-18 15:38:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 15:38:03,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-18 15:38:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:38:03,529 INFO L225 Difference]: With dead ends: 2245 [2020-08-18 15:38:03,529 INFO L226 Difference]: Without dead ends: 2242 [2020-08-18 15:38:03,532 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 [2020-08-18 15:38:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-18 15:38:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-18 15:38:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-18 15:38:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-18 15:38:03,869 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-18 15:38:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:38:03,869 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-18 15:38:03,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:38:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-18 15:38:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-18 15:38:03,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:38:03,879 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] [2020-08-18 15:38:03,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:38:03,880 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:38:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:38:03,880 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-18 15:38:03,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:38:03,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811456390] [2020-08-18 15:38:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:38:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:03,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:38:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:03,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:38:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:03,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:38:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:03,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:38:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 15:38:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 15:38:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 15:38:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 15:38:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-18 15:38:04,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811456390] [2020-08-18 15:38:04,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:38:04,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 15:38:04,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039535844] [2020-08-18 15:38:04,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:38:04,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:38:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:38:04,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:38:04,070 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-18 15:38:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:38:04,937 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-18 15:38:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:38:04,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-18 15:38:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:38:04,952 INFO L225 Difference]: With dead ends: 3453 [2020-08-18 15:38:04,952 INFO L226 Difference]: Without dead ends: 1708 [2020-08-18 15:38:04,997 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 [2020-08-18 15:38:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-18 15:38:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-18 15:38:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-18 15:38:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-18 15:38:05,264 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-18 15:38:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:38:05,265 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-18 15:38:05,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:38:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-18 15:38:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 15:38:05,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:38:05,274 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] [2020-08-18 15:38:05,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:38:05,275 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:38:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:38:05,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-18 15:38:05,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:38:05,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606006870] [2020-08-18 15:38:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:38:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:38:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:38:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:38:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:38:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 15:38:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 15:38:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 15:38:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 15:38:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:38:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-18 15:38:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:38:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:38:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:38:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-18 15:38:05,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606006870] [2020-08-18 15:38:05,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:38:05,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:38:05,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045547208] [2020-08-18 15:38:05,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:38:05,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:38:05,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:38:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:38:05,609 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-18 15:38:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:38:07,290 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-18 15:38:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 15:38:07,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-18 15:38:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:38:07,292 INFO L225 Difference]: With dead ends: 1974 [2020-08-18 15:38:07,293 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:38:07,309 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 [2020-08-18 15:38:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:38:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:38:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:38:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:38:07,311 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-18 15:38:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:38:07,311 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:38:07,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:38:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:38:07,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:38:07,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:38:07,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:38:07,904 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-18 15:38:08,676 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-08-18 15:38:12,352 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 140 [2020-08-18 15:38:12,672 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 114 [2020-08-18 15:38:15,212 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 15:38:16,317 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 15:38:17,501 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 15:38:17,770 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-18 15:38:17,888 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 15:38:18,941 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-18 15:38:19,138 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 15:38:20,472 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-18 15:38:21,290 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-18 15:38:22,131 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-18 15:38:22,581 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-18 15:38:23,685 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 15:38:23,817 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-18 15:38:23,970 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 15:38:27,246 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-18 15:38:27,419 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-18 15:38:27,974 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-18 15:38:28,369 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-18 15:38:28,698 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 15:38:28,896 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 15:38:33,354 WARN L193 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-18 15:38:33,500 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-18 15:38:35,537 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-18 15:38:36,736 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-18 15:38:38,128 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-18 15:38:38,298 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46