/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:32:23,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:32:23,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:32:23,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:32:23,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:32:23,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:32:23,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:32:23,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:32:23,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:32:23,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:32:23,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:32:23,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:32:23,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:32:23,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:32:23,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:32:23,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:32:23,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:32:23,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:32:23,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:32:23,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:32:23,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:32:23,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:32:23,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:32:23,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:32:23,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:32:23,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:32:23,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:32:23,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:32:23,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:32:23,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 04:32:23,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 04:32:23,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 04:32:23,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 04:32:23,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 04:32:23,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 04:32:23,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 04:32:23,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 04:32:23,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 04:32:23,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:32:23,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:32:23,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:32:23,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 04:32:23,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:32:23,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:32:23,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:32:23,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:32:23,905 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:32:23,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:32:23,906 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:32:23,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:32:23,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:32:23,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:32:23,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:32:23,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:32:23,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:32:23,907 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:32:23,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:32:23,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:32:23,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:32:23,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:32:23,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:32:23,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:32:23,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:32:23,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:32:23,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:32:23,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:32:23,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:32:23,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:32:23,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:32:23,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:32:23,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:32:23,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:32:24,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:32:24,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:32:24,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:32:24,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:32:24,212 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:32:24,213 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 04:32:24,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58f1b0b31/c20d0938ab954a3bab1c9195f55cf6fe/FLAG21f957dd3 [2020-08-19 04:32:24,745 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:32:24,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 04:32:24,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58f1b0b31/c20d0938ab954a3bab1c9195f55cf6fe/FLAG21f957dd3 [2020-08-19 04:32:25,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58f1b0b31/c20d0938ab954a3bab1c9195f55cf6fe [2020-08-19 04:32:25,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:32:25,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:32:25,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:32:25,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:32:25,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:32:25,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e6d6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25, skipping insertion in model container [2020-08-19 04:32:25,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:32:25,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:32:25,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:32:25,458 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:32:25,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:32:25,600 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:32:25,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25 WrapperNode [2020-08-19 04:32:25,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:32:25,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:32:25,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:32:25,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:32:25,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... [2020-08-19 04:32:25,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:32:25,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:32:25,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:32:25,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:32:25,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:32:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:32:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:32:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-19 04:32:25,717 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-19 04:32:25,717 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-19 04:32:25,717 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-19 04:32:25,717 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-19 04:32:25,717 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-19 04:32:25,717 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-19 04:32:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-19 04:32:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-19 04:32:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-19 04:32:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-19 04:32:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-19 04:32:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:32:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:32:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:32:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-19 04:32:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-19 04:32:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-19 04:32:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-19 04:32:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-19 04:32:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-19 04:32:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-19 04:32:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-19 04:32:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-19 04:32:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-19 04:32:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-19 04:32:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-19 04:32:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:32:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:32:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:32:26,092 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:32:26,093 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 04:32:26,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:32:26 BoogieIcfgContainer [2020-08-19 04:32:26,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:32:26,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:32:26,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:32:26,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:32:26,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:32:25" (1/3) ... [2020-08-19 04:32:26,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a36fde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:32:26, skipping insertion in model container [2020-08-19 04:32:26,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:32:25" (2/3) ... [2020-08-19 04:32:26,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a36fde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:32:26, skipping insertion in model container [2020-08-19 04:32:26,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:32:26" (3/3) ... [2020-08-19 04:32:26,107 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-19 04:32:26,117 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:32:26,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:32:26,154 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:32:26,185 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:32:26,185 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:32:26,186 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:32:26,186 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:32:26,186 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:32:26,186 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:32:26,186 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:32:26,186 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:32:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-19 04:32:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 04:32:26,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:26,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:26,220 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-19 04:32:26,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:26,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654370239] [2020-08-19 04:32:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 04:32:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:26,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654370239] [2020-08-19 04:32:26,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:26,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:32:26,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840554052] [2020-08-19 04:32:26,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:32:26,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:32:26,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:32:26,812 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-19 04:32:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:27,889 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-19 04:32:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:32:27,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-19 04:32:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:27,908 INFO L225 Difference]: With dead ends: 356 [2020-08-19 04:32:27,909 INFO L226 Difference]: Without dead ends: 248 [2020-08-19 04:32:27,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:32:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-19 04:32:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-19 04:32:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 04:32:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-19 04:32:28,002 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-19 04:32:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:28,002 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-19 04:32:28,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:32:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-19 04:32:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:32:28,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:28,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:28,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:32:28,009 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-19 04:32:28,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:28,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748907483] [2020-08-19 04:32:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:32:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:28,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748907483] [2020-08-19 04:32:28,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:28,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 04:32:28,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450759902] [2020-08-19 04:32:28,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:32:28,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:32:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:32:28,187 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-19 04:32:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:28,805 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-19 04:32:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:32:28,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-19 04:32:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:28,810 INFO L225 Difference]: With dead ends: 406 [2020-08-19 04:32:28,810 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 04:32:28,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:32:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 04:32:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-19 04:32:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-19 04:32:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-19 04:32:28,845 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-19 04:32:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:28,846 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-19 04:32:28,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:32:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-19 04:32:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 04:32:28,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:28,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:28,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:32:28,849 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-19 04:32:28,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:28,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937763216] [2020-08-19 04:32:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:28,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:32:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 04:32:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:29,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937763216] [2020-08-19 04:32:29,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:29,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 04:32:29,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517236972] [2020-08-19 04:32:29,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:32:29,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:29,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:32:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:32:29,087 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-19 04:32:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:30,359 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-19 04:32:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 04:32:30,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-19 04:32:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:30,368 INFO L225 Difference]: With dead ends: 582 [2020-08-19 04:32:30,369 INFO L226 Difference]: Without dead ends: 417 [2020-08-19 04:32:30,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:32:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-19 04:32:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-19 04:32:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-19 04:32:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-19 04:32:30,475 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-19 04:32:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:30,477 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-19 04:32:30,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:32:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-19 04:32:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 04:32:30,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:30,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:30,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:32:30,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:30,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-19 04:32:30,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:30,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452662464] [2020-08-19 04:32:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:32:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 04:32:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:30,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452662464] [2020-08-19 04:32:30,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:30,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-19 04:32:30,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010734832] [2020-08-19 04:32:30,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:32:30,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:30,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:32:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:32:30,747 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-19 04:32:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:33,635 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-19 04:32:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 04:32:33,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-19 04:32:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:33,641 INFO L225 Difference]: With dead ends: 873 [2020-08-19 04:32:33,641 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 04:32:33,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 04:32:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 04:32:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-19 04:32:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-19 04:32:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-19 04:32:33,688 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-19 04:32:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:33,688 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-19 04:32:33,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:32:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-19 04:32:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:32:33,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:33,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:33,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:32:33,690 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-19 04:32:33,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:33,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186806052] [2020-08-19 04:32:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:32:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:33,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186806052] [2020-08-19 04:32:33,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:33,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:32:33,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515012622] [2020-08-19 04:32:33,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:32:33,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:32:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:32:33,958 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-19 04:32:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:35,125 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-19 04:32:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:32:35,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-19 04:32:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:35,132 INFO L225 Difference]: With dead ends: 612 [2020-08-19 04:32:35,132 INFO L226 Difference]: Without dead ends: 418 [2020-08-19 04:32:35,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:32:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-19 04:32:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-19 04:32:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-19 04:32:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-19 04:32:35,191 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-19 04:32:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:35,192 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-19 04:32:35,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:32:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-19 04:32:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:32:35,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:35,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:35,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:32:35,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-19 04:32:35,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:35,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129192863] [2020-08-19 04:32:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:32:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:35,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129192863] [2020-08-19 04:32:35,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:35,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 04:32:35,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803170846] [2020-08-19 04:32:35,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:32:35,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:32:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:32:35,381 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-19 04:32:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:36,226 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-19 04:32:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:32:36,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 04:32:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:36,233 INFO L225 Difference]: With dead ends: 727 [2020-08-19 04:32:36,234 INFO L226 Difference]: Without dead ends: 421 [2020-08-19 04:32:36,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:32:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-19 04:32:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-19 04:32:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-19 04:32:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-19 04:32:36,310 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-19 04:32:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:36,310 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-19 04:32:36,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:32:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-19 04:32:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:32:36,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:36,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:36,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:32:36,312 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-19 04:32:36,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:36,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56618613] [2020-08-19 04:32:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:32:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:36,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56618613] [2020-08-19 04:32:36,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:36,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 04:32:36,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980768223] [2020-08-19 04:32:36,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:32:36,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:32:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:32:36,483 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-19 04:32:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:38,892 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-19 04:32:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 04:32:38,892 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 04:32:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:38,900 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 04:32:38,901 INFO L226 Difference]: Without dead ends: 840 [2020-08-19 04:32:38,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-19 04:32:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-19 04:32:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-19 04:32:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-19 04:32:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-19 04:32:38,979 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-19 04:32:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:38,979 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-19 04:32:38,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:32:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-19 04:32:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:32:38,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:38,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:38,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:32:38,985 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-19 04:32:38,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:38,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895023351] [2020-08-19 04:32:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:32:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:39,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895023351] [2020-08-19 04:32:39,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:39,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 04:32:39,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857544611] [2020-08-19 04:32:39,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:32:39,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:32:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:32:39,155 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-19 04:32:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:40,056 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-19 04:32:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:32:40,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 04:32:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:40,062 INFO L225 Difference]: With dead ends: 1352 [2020-08-19 04:32:40,063 INFO L226 Difference]: Without dead ends: 764 [2020-08-19 04:32:40,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:32:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-19 04:32:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-19 04:32:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-19 04:32:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-19 04:32:40,157 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-19 04:32:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:40,157 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-19 04:32:40,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:32:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-19 04:32:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:32:40,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:40,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:40,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:32:40,160 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-19 04:32:40,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:40,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538278029] [2020-08-19 04:32:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:32:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:32:40,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538278029] [2020-08-19 04:32:40,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:40,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:32:40,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389028082] [2020-08-19 04:32:40,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:32:40,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:40,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:32:40,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:32:40,326 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-19 04:32:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:41,097 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-19 04:32:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:32:41,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-19 04:32:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:41,105 INFO L225 Difference]: With dead ends: 1262 [2020-08-19 04:32:41,105 INFO L226 Difference]: Without dead ends: 814 [2020-08-19 04:32:41,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:32:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-19 04:32:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-19 04:32:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-19 04:32:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-19 04:32:41,186 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-19 04:32:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:41,186 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-19 04:32:41,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:32:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-19 04:32:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 04:32:41,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:41,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:41,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:32:41,190 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-19 04:32:41,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:41,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127843] [2020-08-19 04:32:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 04:32:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 04:32:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 04:32:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:32:41,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127843] [2020-08-19 04:32:41,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:32:41,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:32:41,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885149030] [2020-08-19 04:32:41,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:32:41,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:32:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:32:41,393 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-19 04:32:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:44,010 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-19 04:32:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 04:32:44,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-19 04:32:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:44,019 INFO L225 Difference]: With dead ends: 2276 [2020-08-19 04:32:44,019 INFO L226 Difference]: Without dead ends: 1165 [2020-08-19 04:32:44,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 04:32:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-19 04:32:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-19 04:32:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-19 04:32:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-19 04:32:44,130 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-19 04:32:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:44,130 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-19 04:32:44,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:32:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-19 04:32:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 04:32:44,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:44,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:44,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:32:44,134 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:44,134 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-19 04:32:44,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:44,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863034224] [2020-08-19 04:32:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:32:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 04:32:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 04:32:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 04:32:44,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863034224] [2020-08-19 04:32:44,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:44,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:32:44,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032702725] [2020-08-19 04:32:44,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:32:44,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:44,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:32:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:32:44,357 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-19 04:32:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:45,175 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-19 04:32:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:32:45,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-19 04:32:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:45,184 INFO L225 Difference]: With dead ends: 1198 [2020-08-19 04:32:45,184 INFO L226 Difference]: Without dead ends: 1195 [2020-08-19 04:32:45,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:32:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-19 04:32:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-19 04:32:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-19 04:32:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-19 04:32:45,297 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-19 04:32:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:45,297 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-19 04:32:45,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:32:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-19 04:32:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-19 04:32:45,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:45,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:45,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:32:45,301 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-19 04:32:45,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:45,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945572114] [2020-08-19 04:32:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:32:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 04:32:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 04:32:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 04:32:45,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945572114] [2020-08-19 04:32:45,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:32:45,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:32:45,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706471749] [2020-08-19 04:32:45,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:32:45,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:45,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:32:45,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:32:45,566 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-19 04:32:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:47,680 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-19 04:32:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 04:32:47,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-19 04:32:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:47,696 INFO L225 Difference]: With dead ends: 2245 [2020-08-19 04:32:47,697 INFO L226 Difference]: Without dead ends: 2242 [2020-08-19 04:32:47,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:32:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-19 04:32:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-19 04:32:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-19 04:32:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-19 04:32:47,955 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-19 04:32:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:47,956 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-19 04:32:47,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:32:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-19 04:32:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-19 04:32:47,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:47,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:47,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:32:47,966 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-19 04:32:47,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:47,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647864975] [2020-08-19 04:32:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:32:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 04:32:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 04:32:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 04:32:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-19 04:32:48,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647864975] [2020-08-19 04:32:48,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:32:48,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 04:32:48,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540412345] [2020-08-19 04:32:48,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:32:48,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:48,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:32:48,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:32:48,156 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-19 04:32:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:48,940 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-19 04:32:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:32:48,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-19 04:32:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:48,952 INFO L225 Difference]: With dead ends: 3453 [2020-08-19 04:32:48,952 INFO L226 Difference]: Without dead ends: 1708 [2020-08-19 04:32:48,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:32:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-19 04:32:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-19 04:32:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-19 04:32:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-19 04:32:49,131 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-19 04:32:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:49,131 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-19 04:32:49,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:32:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-19 04:32:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-19 04:32:49,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:32:49,138 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:32:49,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:32:49,138 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:32:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:32:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-19 04:32:49,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:32:49,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311783345] [2020-08-19 04:32:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:32:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:32:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:32:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:32:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:32:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:32:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 04:32:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:32:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 04:32:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 04:32:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-19 04:32:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 04:32:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:32:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:32:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-19 04:32:49,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311783345] [2020-08-19 04:32:49,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:32:49,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:32:49,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211078978] [2020-08-19 04:32:49,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:32:49,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:32:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:32:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:32:49,388 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-19 04:32:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:32:50,993 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-19 04:32:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 04:32:50,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-19 04:32:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:32:50,997 INFO L225 Difference]: With dead ends: 1974 [2020-08-19 04:32:50,997 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:32:51,010 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 [2020-08-19 04:32:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:32:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:32:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:32:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:32:51,011 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-19 04:32:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:32:51,012 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:32:51,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:32:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:32:51,012 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:32:51,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:32:51,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:32:51,654 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 04:32:51,775 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 04:32:53,103 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 04:32:59,641 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 04:33:00,757 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 04:33:01,964 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 04:33:02,243 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-19 04:33:02,360 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 04:33:03,413 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-19 04:33:03,609 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 04:33:04,944 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-19 04:33:05,777 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-19 04:33:06,634 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-19 04:33:07,042 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-19 04:33:08,164 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 04:33:08,297 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-19 04:33:08,452 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 04:33:11,701 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-19 04:33:11,870 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 04:33:12,418 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-19 04:33:12,801 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-19 04:33:13,139 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 04:33:13,334 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 04:33:17,715 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-19 04:33:17,866 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-19 04:33:19,927 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-19 04:33:21,154 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-19 04:33:22,536 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-19 04:33:22,706 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 04:33:23,796 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 209 DAG size of output: 93 [2020-08-19 04:33:23,985 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1