/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:05:54,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 13:05:54,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 13:05:55,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 13:05:55,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 13:05:55,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 13:05:55,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 13:05:55,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 13:05:55,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 13:05:55,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 13:05:55,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 13:05:55,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 13:05:55,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 13:05:55,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 13:05:55,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 13:05:55,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 13:05:55,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 13:05:55,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 13:05:55,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 13:05:55,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 13:05:55,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 13:05:55,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 13:05:55,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 13:05:55,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 13:05:55,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 13:05:55,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:05:55,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:05:55,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:05:55,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 13:05:55,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:05:55,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:05:55,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:05:55,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:05:55,124 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:05:55,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:05:55,125 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:05:55,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:05:55,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:05:55,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:05:55,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:05:55,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:05:55,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:05:55,127 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:05:55,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:05:55,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:05:55,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:05:55,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:05:55,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:05:55,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:05:55,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:05:55,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:05:55,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:05:55,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:05:55,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:05:55,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:05:55,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:05:55,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:05:55,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:05:55,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:05:55,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:05:55,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:05:55,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:05:55,429 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:05:55,430 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:05:55,430 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 13:05:55,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5ef644b8/99894cd77e37438ba8dd362de97835da/FLAG459a0ec23 [2020-08-18 13:05:55,927 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:05:55,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 13:05:55,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5ef644b8/99894cd77e37438ba8dd362de97835da/FLAG459a0ec23 [2020-08-18 13:05:56,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5ef644b8/99894cd77e37438ba8dd362de97835da [2020-08-18 13:05:56,291 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:05:56,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:05:56,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:05:56,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:05:56,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:05:56,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bee2e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56, skipping insertion in model container [2020-08-18 13:05:56,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:05:56,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:05:56,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:05:56,531 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:05:56,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:05:56,683 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:05:56,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56 WrapperNode [2020-08-18 13:05:56,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:05:56,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:05:56,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:05:56,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:05:56,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... [2020-08-18 13:05:56,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:05:56,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:05:56,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:05:56,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:05:56,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:05:56,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:05:56,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:05:56,788 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 13:05:56,788 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 13:05:56,788 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 13:05:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 13:05:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 13:05:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 13:05:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 13:05:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 13:05:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 13:05:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 13:05:56,790 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 13:05:56,790 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 13:05:56,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:05:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:05:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 13:05:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 13:05:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 13:05:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 13:05:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 13:05:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 13:05:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 13:05:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 13:05:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 13:05:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 13:05:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 13:05:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 13:05:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 13:05:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:05:56,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:05:56,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:05:57,171 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:05:57,171 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 13:05:57,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:05:57 BoogieIcfgContainer [2020-08-18 13:05:57,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:05:57,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:05:57,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:05:57,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:05:57,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:05:56" (1/3) ... [2020-08-18 13:05:57,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a8bbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:05:57, skipping insertion in model container [2020-08-18 13:05:57,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:05:56" (2/3) ... [2020-08-18 13:05:57,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a8bbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:05:57, skipping insertion in model container [2020-08-18 13:05:57,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:05:57" (3/3) ... [2020-08-18 13:05:57,200 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-18 13:05:57,210 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:05:57,228 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 13:05:57,241 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 13:05:57,270 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:05:57,270 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:05:57,270 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:05:57,270 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:05:57,271 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:05:57,271 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:05:57,271 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:05:57,271 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:05:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-18 13:05:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 13:05:57,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:57,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:57,304 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-18 13:05:57,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:57,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245788927] [2020-08-18 13:05:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:05:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:05:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 13:05:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:05:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:05:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:05:57,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245788927] [2020-08-18 13:05:57,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:05:57,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 13:05:57,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982824264] [2020-08-18 13:05:57,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 13:05:57,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 13:05:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:05:57,850 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-18 13:05:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:58,948 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-18 13:05:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:05:58,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-18 13:05:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:58,969 INFO L225 Difference]: With dead ends: 356 [2020-08-18 13:05:58,969 INFO L226 Difference]: Without dead ends: 248 [2020-08-18 13:05:58,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:05:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-18 13:05:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-18 13:05:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 13:05:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-18 13:05:59,132 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-18 13:05:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:59,133 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-18 13:05:59,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 13:05:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-18 13:05:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 13:05:59,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:59,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:59,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:05:59,140 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:59,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-18 13:05:59,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:59,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995879897] [2020-08-18 13:05:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:05:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:05:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 13:05:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:05:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:05:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:05:59,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995879897] [2020-08-18 13:05:59,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:05:59,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 13:05:59,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668582729] [2020-08-18 13:05:59,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:05:59,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:59,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:05:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:05:59,351 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-18 13:05:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:59,961 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-18 13:05:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:05:59,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-18 13:05:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:59,966 INFO L225 Difference]: With dead ends: 406 [2020-08-18 13:05:59,966 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 13:05:59,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:05:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 13:06:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-18 13:06:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 13:06:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-18 13:06:00,005 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-18 13:06:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:00,005 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-18 13:06:00,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:06:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-18 13:06:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 13:06:00,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:00,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:00,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:06:00,009 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-18 13:06:00,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:00,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846626509] [2020-08-18 13:06:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 13:06:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 13:06:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:06:00,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846626509] [2020-08-18 13:06:00,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:00,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 13:06:00,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174797689] [2020-08-18 13:06:00,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:06:00,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:06:00,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:06:00,296 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-18 13:06:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:01,552 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-18 13:06:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 13:06:01,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-18 13:06:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:01,560 INFO L225 Difference]: With dead ends: 582 [2020-08-18 13:06:01,560 INFO L226 Difference]: Without dead ends: 417 [2020-08-18 13:06:01,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-18 13:06:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-18 13:06:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-18 13:06:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-18 13:06:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-18 13:06:01,617 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-18 13:06:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:01,617 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-18 13:06:01,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:06:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-18 13:06:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 13:06:01,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:01,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:01,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:06:01,620 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-18 13:06:01,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:01,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270867919] [2020-08-18 13:06:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 13:06:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 13:06:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:06:01,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270867919] [2020-08-18 13:06:01,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:01,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 13:06:01,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317954292] [2020-08-18 13:06:01,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 13:06:01,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 13:06:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:06:01,845 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-18 13:06:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:04,743 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-18 13:06:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 13:06:04,744 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-18 13:06:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:04,755 INFO L225 Difference]: With dead ends: 873 [2020-08-18 13:06:04,755 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 13:06:04,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 13:06:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 13:06:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-18 13:06:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-18 13:06:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-18 13:06:04,804 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-18 13:06:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:04,805 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-18 13:06:04,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 13:06:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-18 13:06:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 13:06:04,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:04,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:04,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:06:04,811 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:04,811 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-18 13:06:04,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:04,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396257250] [2020-08-18 13:06:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 13:06:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:06:04,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396257250] [2020-08-18 13:06:04,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:04,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 13:06:04,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557658410] [2020-08-18 13:06:04,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:06:04,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:06:04,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:06:04,990 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-18 13:06:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:06,061 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-18 13:06:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:06:06,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-18 13:06:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:06,068 INFO L225 Difference]: With dead ends: 612 [2020-08-18 13:06:06,069 INFO L226 Difference]: Without dead ends: 418 [2020-08-18 13:06:06,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-18 13:06:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-18 13:06:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-18 13:06:06,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 13:06:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-18 13:06:06,135 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-18 13:06:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:06,136 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-18 13:06:06,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:06:06,137 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-18 13:06:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 13:06:06,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:06,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:06,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:06:06,141 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-18 13:06:06,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:06,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964641748] [2020-08-18 13:06:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 13:06:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:06:06,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964641748] [2020-08-18 13:06:06,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:06,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 13:06:06,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369627505] [2020-08-18 13:06:06,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:06:06,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:06,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:06:06,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:06:06,336 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-18 13:06:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:07,191 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-18 13:06:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 13:06:07,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 13:06:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:07,195 INFO L225 Difference]: With dead ends: 727 [2020-08-18 13:06:07,195 INFO L226 Difference]: Without dead ends: 421 [2020-08-18 13:06:07,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-18 13:06:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-18 13:06:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-18 13:06:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-18 13:06:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-18 13:06:07,238 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-18 13:06:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:07,240 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-18 13:06:07,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:06:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-18 13:06:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 13:06:07,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:07,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:07,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 13:06:07,242 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-18 13:06:07,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:07,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722067397] [2020-08-18 13:06:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 13:06:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:06:07,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722067397] [2020-08-18 13:06:07,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:07,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 13:06:07,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370240055] [2020-08-18 13:06:07,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:06:07,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:07,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:06:07,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:06:07,419 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-18 13:06:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:10,016 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-18 13:06:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 13:06:10,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 13:06:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:10,023 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 13:06:10,024 INFO L226 Difference]: Without dead ends: 840 [2020-08-18 13:06:10,027 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 [2020-08-18 13:06:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-18 13:06:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-18 13:06:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-18 13:06:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-18 13:06:10,105 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-18 13:06:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:10,106 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-18 13:06:10,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:06:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-18 13:06:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 13:06:10,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:10,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:10,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 13:06:10,113 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:10,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:10,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-18 13:06:10,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:10,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689431898] [2020-08-18 13:06:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 13:06:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:06:10,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689431898] [2020-08-18 13:06:10,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:10,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 13:06:10,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664125772] [2020-08-18 13:06:10,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:06:10,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:06:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:06:10,342 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-18 13:06:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:11,208 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-18 13:06:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:06:11,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 13:06:11,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:11,215 INFO L225 Difference]: With dead ends: 1352 [2020-08-18 13:06:11,215 INFO L226 Difference]: Without dead ends: 764 [2020-08-18 13:06:11,218 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 [2020-08-18 13:06:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-18 13:06:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-18 13:06:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-18 13:06:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-18 13:06:11,291 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-18 13:06:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:11,291 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-18 13:06:11,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:06:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-18 13:06:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 13:06:11,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:11,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:11,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 13:06:11,293 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-18 13:06:11,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:11,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275863966] [2020-08-18 13:06:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 13:06:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:06:11,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275863966] [2020-08-18 13:06:11,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:11,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 13:06:11,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865227787] [2020-08-18 13:06:11,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 13:06:11,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:11,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 13:06:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:06:11,474 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-18 13:06:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:12,192 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-18 13:06:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:06:12,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-18 13:06:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:12,198 INFO L225 Difference]: With dead ends: 1262 [2020-08-18 13:06:12,198 INFO L226 Difference]: Without dead ends: 814 [2020-08-18 13:06:12,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:06:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-18 13:06:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-18 13:06:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-18 13:06:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-18 13:06:12,280 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-18 13:06:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:12,280 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-18 13:06:12,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 13:06:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-18 13:06:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 13:06:12,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:12,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:12,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 13:06:12,285 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-18 13:06:12,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:12,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452747915] [2020-08-18 13:06:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:06:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 13:06:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 13:06:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 13:06:12,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452747915] [2020-08-18 13:06:12,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:06:12,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:06:12,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240063637] [2020-08-18 13:06:12,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:06:12,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:12,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:06:12,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:06:12,478 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-18 13:06:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:15,125 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-18 13:06:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 13:06:15,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-18 13:06:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:15,135 INFO L225 Difference]: With dead ends: 2276 [2020-08-18 13:06:15,135 INFO L226 Difference]: Without dead ends: 1165 [2020-08-18 13:06:15,142 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 [2020-08-18 13:06:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-18 13:06:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-18 13:06:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-18 13:06:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-18 13:06:15,252 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-18 13:06:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:15,252 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-18 13:06:15,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:06:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-18 13:06:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 13:06:15,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:15,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:15,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 13:06:15,256 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-18 13:06:15,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:15,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309861410] [2020-08-18 13:06:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 13:06:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 13:06:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 13:06:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 13:06:15,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309861410] [2020-08-18 13:06:15,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:15,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 13:06:15,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952768508] [2020-08-18 13:06:15,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:06:15,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:06:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:06:15,438 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-18 13:06:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:16,257 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-18 13:06:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:06:16,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-18 13:06:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:16,265 INFO L225 Difference]: With dead ends: 1198 [2020-08-18 13:06:16,265 INFO L226 Difference]: Without dead ends: 1195 [2020-08-18 13:06:16,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-18 13:06:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-18 13:06:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-18 13:06:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-18 13:06:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-18 13:06:16,375 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-18 13:06:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:16,375 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-18 13:06:16,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:06:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-18 13:06:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 13:06:16,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:16,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:16,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 13:06:16,378 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-18 13:06:16,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:16,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600319651] [2020-08-18 13:06:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 13:06:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 13:06:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 13:06:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 13:06:16,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600319651] [2020-08-18 13:06:16,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:06:16,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:06:16,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112861881] [2020-08-18 13:06:16,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:06:16,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:06:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:06:16,701 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-18 13:06:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:19,000 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-18 13:06:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 13:06:19,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-18 13:06:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:19,017 INFO L225 Difference]: With dead ends: 2245 [2020-08-18 13:06:19,017 INFO L226 Difference]: Without dead ends: 2242 [2020-08-18 13:06:19,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-18 13:06:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-18 13:06:19,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-18 13:06:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-18 13:06:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-18 13:06:19,306 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-18 13:06:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:19,307 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-18 13:06:19,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:06:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-18 13:06:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-18 13:06:19,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:19,316 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:19,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 13:06:19,316 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-18 13:06:19,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:19,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216365626] [2020-08-18 13:06:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 13:06:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 13:06:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 13:06:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 13:06:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-18 13:06:19,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216365626] [2020-08-18 13:06:19,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:06:19,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 13:06:19,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506883190] [2020-08-18 13:06:19,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:06:19,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:19,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:06:19,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:06:19,516 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-18 13:06:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:20,333 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-18 13:06:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:06:20,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-18 13:06:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:20,346 INFO L225 Difference]: With dead ends: 3453 [2020-08-18 13:06:20,346 INFO L226 Difference]: Without dead ends: 1708 [2020-08-18 13:06:20,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:06:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-18 13:06:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-18 13:06:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-18 13:06:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-18 13:06:20,643 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-18 13:06:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:20,644 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-18 13:06:20,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:06:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-18 13:06:20,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 13:06:20,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:06:20,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:06:20,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 13:06:20,652 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:06:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:06:20,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-18 13:06:20,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:06:20,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737307260] [2020-08-18 13:06:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:06:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:06:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:06:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 13:06:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 13:06:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 13:06:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 13:06:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 13:06:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 13:06:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 13:06:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-18 13:06:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 13:06:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:20,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 13:06:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:06:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-18 13:06:21,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737307260] [2020-08-18 13:06:21,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:06:21,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 13:06:21,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515543533] [2020-08-18 13:06:21,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 13:06:21,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:06:21,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 13:06:21,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:06:21,003 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-18 13:06:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:06:22,595 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-18 13:06:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 13:06:22,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-18 13:06:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:06:22,600 INFO L225 Difference]: With dead ends: 1974 [2020-08-18 13:06:22,600 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 13:06:22,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-18 13:06:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 13:06:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 13:06:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 13:06:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 13:06:22,615 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-18 13:06:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:06:22,615 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 13:06:22,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 13:06:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 13:06:22,616 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 13:06:22,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 13:06:22,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 13:06:23,088 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-18 13:06:25,086 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 121 [2020-08-18 13:06:30,605 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 13:06:31,646 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 13:06:32,807 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 13:06:33,061 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-18 13:06:33,172 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 13:06:34,142 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-18 13:06:34,339 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 13:06:35,653 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-18 13:06:36,487 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-18 13:06:37,350 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-18 13:06:37,760 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-18 13:06:38,908 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 13:06:39,046 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-18 13:06:39,200 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 13:06:42,571 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-18 13:06:42,755 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-18 13:06:43,321 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-18 13:06:43,723 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-18 13:06:44,079 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 13:06:44,276 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 13:06:48,801 WARN L193 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-18 13:06:48,949 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-18 13:06:51,098 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-18 13:06:52,323 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-18 13:06:53,690 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-18 13:06:53,865 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-18 13:06:54,970 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 209 DAG size of output: 93 [2020-08-18 13:06:55,174 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1