/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:26:02,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:26:02,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:26:02,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:26:02,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:26:02,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:26:02,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:26:02,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:26:02,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:26:02,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:26:02,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:26:02,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:26:02,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:26:02,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:26:02,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:26:02,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:26:02,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:26:02,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:26:02,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:26:02,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:26:02,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:26:02,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:26:02,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:26:02,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:26:02,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:26:02,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:26:02,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:26:02,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:26:02,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:26:02,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 06:26:02,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:26:02,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:26:02,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:26:02,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:26:02,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:26:02,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:26:02,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:26:02,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:26:02,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:26:02,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:26:02,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:26:02,572 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 06:26:02,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:26:02,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:26:02,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:26:02,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:26:02,610 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:26:02,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:26:02,611 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:26:02,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:26:02,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:26:02,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:26:02,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:26:02,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:26:02,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:26:02,613 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:26:02,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:26:02,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:26:02,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:26:02,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:26:02,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:26:02,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:26:02,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:26:02,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:26:02,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:26:02,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:26:02,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:26:02,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:26:02,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:26:02,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:26:02,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:26:02,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:26:02,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:26:02,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:26:02,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:26:02,974 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:26:02,975 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:26:02,976 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-22 06:26:03,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f4e6fe31/1f64e5daa04142f99319ccc9a05b79ed/FLAG4905e13a1 [2020-08-22 06:26:03,507 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:26:03,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-22 06:26:03,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f4e6fe31/1f64e5daa04142f99319ccc9a05b79ed/FLAG4905e13a1 [2020-08-22 06:26:04,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f4e6fe31/1f64e5daa04142f99319ccc9a05b79ed [2020-08-22 06:26:04,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:26:04,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:26:04,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:26:04,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:26:04,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:26:04,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b1f13a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04, skipping insertion in model container [2020-08-22 06:26:04,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:26:04,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:26:04,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:26:04,323 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:26:04,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:26:04,380 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:26:04,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04 WrapperNode [2020-08-22 06:26:04,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:26:04,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:26:04,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:26:04,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:26:04,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... [2020-08-22 06:26:04,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:26:04,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:26:04,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:26:04,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:26:04,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:26:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:26:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:26:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-22 06:26:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-22 06:26:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-22 06:26:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-22 06:26:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-22 06:26:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-22 06:26:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-22 06:26:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-22 06:26:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-22 06:26:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-22 06:26:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-22 06:26:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-22 06:26:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:26:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:26:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:26:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-22 06:26:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-22 06:26:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-22 06:26:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-22 06:26:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-22 06:26:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-22 06:26:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-22 06:26:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-22 06:26:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-22 06:26:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-22 06:26:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-22 06:26:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-22 06:26:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:26:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:26:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:26:04,985 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:26:04,985 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 06:26:04,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:26:04 BoogieIcfgContainer [2020-08-22 06:26:04,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:26:04,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:26:04,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:26:04,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:26:04,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:26:04" (1/3) ... [2020-08-22 06:26:04,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7307d194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:26:04, skipping insertion in model container [2020-08-22 06:26:04,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:26:04" (2/3) ... [2020-08-22 06:26:04,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7307d194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:26:04, skipping insertion in model container [2020-08-22 06:26:04,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:26:04" (3/3) ... [2020-08-22 06:26:04,999 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-22 06:26:05,010 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:26:05,018 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:26:05,032 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:26:05,057 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:26:05,058 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:26:05,058 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:26:05,058 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:26:05,058 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:26:05,058 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:26:05,059 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:26:05,059 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:26:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-22 06:26:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 06:26:05,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:05,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:05,090 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:05,095 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-22 06:26:05,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:05,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365678089] [2020-08-22 06:26:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 06:26:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:05,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365678089] [2020-08-22 06:26:05,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:05,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:26:05,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686083054] [2020-08-22 06:26:05,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:26:05,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:05,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:26:05,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:26:05,593 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-22 06:26:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:06,730 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-22 06:26:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:26:06,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-22 06:26:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:06,750 INFO L225 Difference]: With dead ends: 356 [2020-08-22 06:26:06,750 INFO L226 Difference]: Without dead ends: 248 [2020-08-22 06:26:06,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:26:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-22 06:26:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-22 06:26:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 06:26:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-22 06:26:06,852 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-22 06:26:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:06,853 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-22 06:26:06,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:26:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-22 06:26:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 06:26:06,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:06,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:06,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:26:06,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:06,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-22 06:26:06,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:06,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918508659] [2020-08-22 06:26:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:26:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:07,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918508659] [2020-08-22 06:26:07,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:07,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 06:26:07,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165622431] [2020-08-22 06:26:07,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:26:07,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:26:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:26:07,091 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-22 06:26:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:07,827 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-22 06:26:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:26:07,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-22 06:26:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:07,838 INFO L225 Difference]: With dead ends: 406 [2020-08-22 06:26:07,838 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 06:26:07,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:26:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 06:26:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-22 06:26:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-22 06:26:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-22 06:26:07,903 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-22 06:26:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:07,903 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-22 06:26:07,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:26:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-22 06:26:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 06:26:07,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:07,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:07,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:26:07,912 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:07,914 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-22 06:26:07,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:07,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675718311] [2020-08-22 06:26:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:26:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 06:26:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:08,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675718311] [2020-08-22 06:26:08,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:08,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:26:08,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286886494] [2020-08-22 06:26:08,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:26:08,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:08,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:26:08,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:26:08,147 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-22 06:26:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:09,377 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-22 06:26:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 06:26:09,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-22 06:26:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:09,383 INFO L225 Difference]: With dead ends: 582 [2020-08-22 06:26:09,384 INFO L226 Difference]: Without dead ends: 417 [2020-08-22 06:26:09,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:26:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-22 06:26:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-22 06:26:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-22 06:26:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-22 06:26:09,448 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-22 06:26:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:09,448 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-22 06:26:09,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:26:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-22 06:26:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 06:26:09,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:09,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:09,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:26:09,452 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:09,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-22 06:26:09,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:09,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792459311] [2020-08-22 06:26:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:26:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 06:26:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:09,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792459311] [2020-08-22 06:26:09,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:09,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 06:26:09,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247118496] [2020-08-22 06:26:09,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:26:09,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:09,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:26:09,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:26:09,723 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-22 06:26:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:12,738 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-22 06:26:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 06:26:12,739 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-22 06:26:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:12,747 INFO L225 Difference]: With dead ends: 873 [2020-08-22 06:26:12,747 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 06:26:12,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 06:26:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 06:26:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-22 06:26:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-22 06:26:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-22 06:26:12,807 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-22 06:26:12,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:12,808 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-22 06:26:12,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:26:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-22 06:26:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 06:26:12,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:12,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:12,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:26:12,819 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:12,819 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-22 06:26:12,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:12,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642061655] [2020-08-22 06:26:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:12,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:12,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:13,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:13,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:13,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:26:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:13,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:13,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:13,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642061655] [2020-08-22 06:26:13,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:13,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 06:26:13,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420187175] [2020-08-22 06:26:13,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:26:13,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:13,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:26:13,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:26:13,083 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-22 06:26:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:14,174 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-22 06:26:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:26:14,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-22 06:26:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:14,178 INFO L225 Difference]: With dead ends: 612 [2020-08-22 06:26:14,179 INFO L226 Difference]: Without dead ends: 418 [2020-08-22 06:26:14,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:26:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-22 06:26:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-22 06:26:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 06:26:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-22 06:26:14,236 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-22 06:26:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:14,237 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-22 06:26:14,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:26:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-22 06:26:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 06:26:14,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:14,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:14,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:26:14,239 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-22 06:26:14,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:14,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917673935] [2020-08-22 06:26:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:26:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:14,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917673935] [2020-08-22 06:26:14,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:14,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:26:14,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318191536] [2020-08-22 06:26:14,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:26:14,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:26:14,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:26:14,459 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-22 06:26:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:15,266 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-22 06:26:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:26:15,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 06:26:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:15,269 INFO L225 Difference]: With dead ends: 727 [2020-08-22 06:26:15,270 INFO L226 Difference]: Without dead ends: 421 [2020-08-22 06:26:15,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:26:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-22 06:26:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-22 06:26:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-22 06:26:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-22 06:26:15,311 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-22 06:26:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:15,311 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-22 06:26:15,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:26:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-22 06:26:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 06:26:15,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:15,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:15,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:26:15,313 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-22 06:26:15,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:15,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228477874] [2020-08-22 06:26:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:26:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:15,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228477874] [2020-08-22 06:26:15,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:15,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:26:15,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228587159] [2020-08-22 06:26:15,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:26:15,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:15,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:26:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:26:15,452 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-22 06:26:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:18,004 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-22 06:26:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 06:26:18,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 06:26:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:18,011 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 06:26:18,012 INFO L226 Difference]: Without dead ends: 840 [2020-08-22 06:26:18,015 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 [2020-08-22 06:26:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-22 06:26:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-22 06:26:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-22 06:26:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-22 06:26:18,091 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-22 06:26:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:18,092 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-22 06:26:18,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:26:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-22 06:26:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 06:26:18,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:18,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:18,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:26:18,097 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-22 06:26:18,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:18,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125940172] [2020-08-22 06:26:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:26:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:18,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125940172] [2020-08-22 06:26:18,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:18,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:26:18,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523398770] [2020-08-22 06:26:18,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:26:18,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:26:18,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:26:18,295 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-22 06:26:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:19,178 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-22 06:26:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:26:19,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 06:26:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:19,185 INFO L225 Difference]: With dead ends: 1352 [2020-08-22 06:26:19,185 INFO L226 Difference]: Without dead ends: 764 [2020-08-22 06:26:19,191 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 [2020-08-22 06:26:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-22 06:26:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-22 06:26:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-22 06:26:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-22 06:26:19,277 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-22 06:26:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:19,277 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-22 06:26:19,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:26:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-22 06:26:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 06:26:19,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:19,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:19,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:26:19,280 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-22 06:26:19,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:19,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454743203] [2020-08-22 06:26:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:26:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:26:19,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454743203] [2020-08-22 06:26:19,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:19,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:26:19,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881271226] [2020-08-22 06:26:19,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:26:19,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:19,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:26:19,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:26:19,429 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-22 06:26:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:20,134 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-22 06:26:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:26:20,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-22 06:26:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:20,144 INFO L225 Difference]: With dead ends: 1262 [2020-08-22 06:26:20,144 INFO L226 Difference]: Without dead ends: 814 [2020-08-22 06:26:20,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:26:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-22 06:26:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-22 06:26:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-22 06:26:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-22 06:26:20,325 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-22 06:26:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:20,325 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-22 06:26:20,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:26:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-22 06:26:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 06:26:20,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:20,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:20,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:26:20,331 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:20,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-22 06:26:20,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:20,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429643180] [2020-08-22 06:26:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 06:26:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 06:26:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 06:26:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 06:26:20,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429643180] [2020-08-22 06:26:20,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:26:20,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:26:20,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134408121] [2020-08-22 06:26:20,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:26:20,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:20,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:26:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:26:20,600 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-22 06:26:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:23,233 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-22 06:26:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 06:26:23,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-22 06:26:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:23,242 INFO L225 Difference]: With dead ends: 2276 [2020-08-22 06:26:23,242 INFO L226 Difference]: Without dead ends: 1165 [2020-08-22 06:26:23,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 06:26:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-22 06:26:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-22 06:26:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-22 06:26:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-22 06:26:23,361 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-22 06:26:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:23,362 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-22 06:26:23,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:26:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-22 06:26:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 06:26:23,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:23,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:23,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:26:23,365 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:23,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:23,366 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-22 06:26:23,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:23,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214729138] [2020-08-22 06:26:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:26:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 06:26:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 06:26:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 06:26:23,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214729138] [2020-08-22 06:26:23,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:23,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 06:26:23,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689320330] [2020-08-22 06:26:23,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:26:23,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:26:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:26:23,539 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-22 06:26:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:24,388 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-22 06:26:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:26:24,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-22 06:26:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:24,397 INFO L225 Difference]: With dead ends: 1198 [2020-08-22 06:26:24,397 INFO L226 Difference]: Without dead ends: 1195 [2020-08-22 06:26:24,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-22 06:26:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-22 06:26:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-22 06:26:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-22 06:26:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-22 06:26:24,509 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-22 06:26:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:24,510 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-22 06:26:24,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:26:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-22 06:26:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 06:26:24,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:24,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:24,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:26:24,514 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-22 06:26:24,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:24,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045164309] [2020-08-22 06:26:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:26:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 06:26:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 06:26:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 06:26:24,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045164309] [2020-08-22 06:26:24,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:26:24,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:26:24,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55987374] [2020-08-22 06:26:24,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:26:24,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:26:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:26:24,764 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-22 06:26:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:26,926 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-22 06:26:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 06:26:26,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-22 06:26:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:26,944 INFO L225 Difference]: With dead ends: 2245 [2020-08-22 06:26:26,945 INFO L226 Difference]: Without dead ends: 2242 [2020-08-22 06:26:26,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-22 06:26:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-22 06:26:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-22 06:26:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-22 06:26:27,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-22 06:26:27,244 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-22 06:26:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:27,244 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-22 06:26:27,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:26:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-22 06:26:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-22 06:26:27,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:27,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:27,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:26:27,252 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-22 06:26:27,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:27,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682217735] [2020-08-22 06:26:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:26:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 06:26:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 06:26:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 06:26:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-22 06:26:27,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682217735] [2020-08-22 06:26:27,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:26:27,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 06:26:27,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126251506] [2020-08-22 06:26:27,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:26:27,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:27,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:26:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:26:27,451 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-22 06:26:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:28,233 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-22 06:26:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:26:28,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-22 06:26:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:28,247 INFO L225 Difference]: With dead ends: 3453 [2020-08-22 06:26:28,247 INFO L226 Difference]: Without dead ends: 1708 [2020-08-22 06:26:28,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:26:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-22 06:26:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-22 06:26:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-22 06:26:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-22 06:26:28,530 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-22 06:26:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:28,531 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-22 06:26:28,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:26:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-22 06:26:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 06:26:28,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:26:28,538 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:26:28,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:26:28,538 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:26:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:26:28,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-22 06:26:28,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:26:28,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323055772] [2020-08-22 06:26:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:26:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:26:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:26:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:26:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:26:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:26:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 06:26:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 06:26:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 06:26:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 06:26:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 06:26:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:26:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:26:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:26:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-22 06:26:28,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323055772] [2020-08-22 06:26:28,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:26:28,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 06:26:28,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571040157] [2020-08-22 06:26:28,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 06:26:28,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:26:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 06:26:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:26:28,794 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-22 06:26:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:26:30,405 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-22 06:26:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 06:26:30,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-22 06:26:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:26:30,407 INFO L225 Difference]: With dead ends: 1974 [2020-08-22 06:26:30,407 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:26:30,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-22 06:26:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:26:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:26:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:26:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:26:30,423 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-22 06:26:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:26:30,423 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:26:30,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 06:26:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:26:30,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:26:30,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:26:30,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:26:37,235 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2020-08-22 06:26:38,475 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 06:26:39,585 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 06:26:40,768 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 06:26:41,043 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-22 06:26:41,162 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-22 06:26:42,249 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-22 06:26:42,445 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 06:26:43,788 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-22 06:26:44,611 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-22 06:26:45,441 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-22 06:26:45,874 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-22 06:26:46,980 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-22 06:26:47,111 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-22 06:26:47,266 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-22 06:26:50,596 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-22 06:26:50,761 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-22 06:26:51,320 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-22 06:26:51,720 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-22 06:26:52,065 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 06:26:52,268 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-22 06:26:56,641 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-22 06:26:56,790 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-22 06:26:58,844 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-22 06:27:00,040 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-22 06:27:01,475 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-22 06:27:01,644 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-22 06:27:02,769 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 209 DAG size of output: 93 [2020-08-22 06:27:02,967 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1