/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:29:35,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:29:35,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:29:35,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:29:35,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:29:35,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:29:35,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:29:35,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:29:35,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:29:35,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:29:35,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:29:35,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:29:35,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:29:35,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:29:35,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:29:35,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:29:35,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:29:35,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:29:35,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:29:35,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:29:35,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:29:35,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:29:35,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:29:35,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:29:35,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:29:35,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:29:35,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:29:35,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:29:35,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:29:35,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:29:35,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:29:35,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:29:35,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:29:35,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:29:35,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:29:35,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:29:35,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:29:35,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:29:35,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:29:35,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:29:35,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:29:35,639 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 [2020-08-21 17:29:35,665 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:29:35,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:29:35,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:29:35,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:29:35,667 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:29:35,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:29:35,668 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:29:35,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:29:35,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:29:35,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:29:35,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:29:35,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:29:35,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:29:35,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:29:35,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:29:35,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:29:35,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:29:35,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:29:35,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:29:35,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:29:35,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:29:35,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:29:35,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:29:35,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:29:35,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:29:35,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:29:35,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:29:35,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:29:35,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:29:35,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:29:35,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:29:35,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:29:35,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:29:35,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:29:35,996 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:29:35,997 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 17:29:36,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be9555107/894f2d90a8324552b667a14e27f893ee/FLAGaf77f8f5f [2020-08-21 17:29:36,534 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:29:36,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 17:29:36,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be9555107/894f2d90a8324552b667a14e27f893ee/FLAGaf77f8f5f [2020-08-21 17:29:36,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be9555107/894f2d90a8324552b667a14e27f893ee [2020-08-21 17:29:36,917 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:29:36,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:29:36,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:29:36,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:29:36,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:29:36,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:29:36" (1/1) ... [2020-08-21 17:29:36,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2234316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:36, skipping insertion in model container [2020-08-21 17:29:36,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:29:36" (1/1) ... [2020-08-21 17:29:36,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:29:36,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:29:37,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:29:37,237 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:29:37,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:29:37,310 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:29:37,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37 WrapperNode [2020-08-21 17:29:37,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:29:37,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:29:37,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:29:37,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:29:37,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (1/1) ... [2020-08-21 17:29:37,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (1/1) ... [2020-08-21 17:29:37,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (1/1) ... [2020-08-21 17:29:37,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (1/1) ... [2020-08-21 17:29:37,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (1/1) ... [2020-08-21 17:29:37,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (1/1) ... [2020-08-21 17:29:37,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (1/1) ... [2020-08-21 17:29:37,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:29:37,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:29:37,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:29:37,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:29:37,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (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 [2020-08-21 17:29:37,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:29:37,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:29:37,497 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 17:29:37,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 17:29:37,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 17:29:37,497 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 17:29:37,498 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 17:29:37,498 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 17:29:37,498 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 17:29:37,498 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 17:29:37,498 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 17:29:37,498 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 17:29:37,499 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 17:29:37,499 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 17:29:37,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:29:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:29:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:29:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 17:29:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 17:29:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 17:29:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 17:29:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 17:29:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 17:29:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 17:29:37,503 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 17:29:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 17:29:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 17:29:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 17:29:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 17:29:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:29:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:29:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:29:37,987 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:29:37,988 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 17:29:38,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:29:37 BoogieIcfgContainer [2020-08-21 17:29:38,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:29:38,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:29:38,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:29:38,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:29:38,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:29:36" (1/3) ... [2020-08-21 17:29:38,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf0774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:29:38, skipping insertion in model container [2020-08-21 17:29:38,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:37" (2/3) ... [2020-08-21 17:29:38,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf0774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:29:38, skipping insertion in model container [2020-08-21 17:29:38,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:29:37" (3/3) ... [2020-08-21 17:29:38,012 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-21 17:29:38,022 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:29:38,036 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:29:38,048 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:29:38,069 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:29:38,070 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:29:38,070 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:29:38,070 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:29:38,070 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:29:38,070 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:29:38,071 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:29:38,071 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:29:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-21 17:29:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 17:29:38,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:38,103 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] [2020-08-21 17:29:38,103 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-21 17:29:38,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:38,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202585833] [2020-08-21 17:29:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:29:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:38,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202585833] [2020-08-21 17:29:38,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:38,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:29:38,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139393234] [2020-08-21 17:29:38,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:29:38,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:29:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:29:38,656 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-21 17:29:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:39,857 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-21 17:29:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:29:39,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 17:29:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:39,876 INFO L225 Difference]: With dead ends: 356 [2020-08-21 17:29:39,876 INFO L226 Difference]: Without dead ends: 248 [2020-08-21 17:29:39,881 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 [2020-08-21 17:29:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-21 17:29:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-21 17:29:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 17:29:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-21 17:29:39,967 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-21 17:29:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:39,968 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-21 17:29:39,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:29:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-21 17:29:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 17:29:39,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:39,974 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] [2020-08-21 17:29:39,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:29:39,974 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-21 17:29:39,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:39,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069140857] [2020-08-21 17:29:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:29:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:40,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069140857] [2020-08-21 17:29:40,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:40,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:29:40,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52889346] [2020-08-21 17:29:40,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:29:40,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:29:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:29:40,172 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-21 17:29:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:40,770 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-21 17:29:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:29:40,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-21 17:29:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:40,776 INFO L225 Difference]: With dead ends: 406 [2020-08-21 17:29:40,780 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 17:29:40,784 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 [2020-08-21 17:29:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 17:29:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-21 17:29:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 17:29:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-21 17:29:40,853 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-21 17:29:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:40,853 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-21 17:29:40,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:29:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-21 17:29:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 17:29:40,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:40,863 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] [2020-08-21 17:29:40,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:29:40,863 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:40,864 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-21 17:29:40,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:40,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341398144] [2020-08-21 17:29:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:29:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 17:29:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:41,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341398144] [2020-08-21 17:29:41,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:41,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:29:41,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555597615] [2020-08-21 17:29:41,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:29:41,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:29:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:29:41,174 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-21 17:29:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:42,334 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-21 17:29:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 17:29:42,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-21 17:29:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:42,340 INFO L225 Difference]: With dead ends: 582 [2020-08-21 17:29:42,341 INFO L226 Difference]: Without dead ends: 417 [2020-08-21 17:29:42,342 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 [2020-08-21 17:29:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-21 17:29:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-21 17:29:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-21 17:29:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-21 17:29:42,423 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-21 17:29:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:42,424 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-21 17:29:42,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:29:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-21 17:29:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 17:29:42,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:42,427 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] [2020-08-21 17:29:42,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:29:42,428 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-21 17:29:42,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:42,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706395595] [2020-08-21 17:29:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:29:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:29:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:42,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706395595] [2020-08-21 17:29:42,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:42,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 17:29:42,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432219630] [2020-08-21 17:29:42,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:29:42,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:29:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:29:42,684 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-21 17:29:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:45,422 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-21 17:29:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 17:29:45,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-21 17:29:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:45,429 INFO L225 Difference]: With dead ends: 873 [2020-08-21 17:29:45,429 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 17:29:45,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 17:29:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 17:29:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-21 17:29:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 17:29:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 17:29:45,489 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-21 17:29:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:45,490 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 17:29:45,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:29:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 17:29:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 17:29:45,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:45,492 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] [2020-08-21 17:29:45,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:29:45,502 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:45,502 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-21 17:29:45,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:45,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792652344] [2020-08-21 17:29:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:29:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:45,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792652344] [2020-08-21 17:29:45,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:45,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:29:45,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560157070] [2020-08-21 17:29:45,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:29:45,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:45,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:29:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:29:45,695 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-21 17:29:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:46,854 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-21 17:29:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:29:46,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-21 17:29:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:46,859 INFO L225 Difference]: With dead ends: 612 [2020-08-21 17:29:46,860 INFO L226 Difference]: Without dead ends: 418 [2020-08-21 17:29:46,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:29:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-21 17:29:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-21 17:29:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 17:29:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-21 17:29:46,906 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-21 17:29:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:46,907 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-21 17:29:46,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:29:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-21 17:29:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 17:29:46,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:46,910 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] [2020-08-21 17:29:46,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:29:46,910 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-21 17:29:46,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:46,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11054842] [2020-08-21 17:29:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:46,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:46,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:47,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:47,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:47,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:29:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:47,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:47,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:47,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11054842] [2020-08-21 17:29:47,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:47,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:29:47,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211845786] [2020-08-21 17:29:47,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:29:47,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:47,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:29:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:29:47,092 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-21 17:29:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:47,968 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-21 17:29:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:29:47,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 17:29:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:47,974 INFO L225 Difference]: With dead ends: 727 [2020-08-21 17:29:47,974 INFO L226 Difference]: Without dead ends: 421 [2020-08-21 17:29:47,976 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 [2020-08-21 17:29:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-21 17:29:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-21 17:29:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-21 17:29:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-21 17:29:48,018 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-21 17:29:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:48,019 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-21 17:29:48,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:29:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-21 17:29:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 17:29:48,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:48,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:48,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:29:48,020 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:48,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-21 17:29:48,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:48,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533776847] [2020-08-21 17:29:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:29:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:48,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533776847] [2020-08-21 17:29:48,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:48,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:29:48,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068473252] [2020-08-21 17:29:48,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:29:48,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:48,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:29:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:29:48,199 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-21 17:29:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:50,700 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-21 17:29:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 17:29:50,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 17:29:50,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:50,710 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 17:29:50,710 INFO L226 Difference]: Without dead ends: 840 [2020-08-21 17:29:50,714 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 [2020-08-21 17:29:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-21 17:29:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-21 17:29:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-21 17:29:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-21 17:29:50,831 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-21 17:29:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:50,832 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-21 17:29:50,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:29:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-21 17:29:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 17:29:50,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:50,835 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] [2020-08-21 17:29:50,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:29:50,835 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:50,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-21 17:29:50,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:50,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560729747] [2020-08-21 17:29:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:50,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:50,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:50,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:50,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:50,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:29:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:51,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:51,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:51,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560729747] [2020-08-21 17:29:51,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:51,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:29:51,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562373155] [2020-08-21 17:29:51,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:29:51,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:29:51,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:29:51,047 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-21 17:29:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:51,921 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-21 17:29:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:29:51,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 17:29:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:51,929 INFO L225 Difference]: With dead ends: 1352 [2020-08-21 17:29:51,929 INFO L226 Difference]: Without dead ends: 764 [2020-08-21 17:29:51,932 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 [2020-08-21 17:29:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-21 17:29:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-21 17:29:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-21 17:29:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-21 17:29:52,014 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-21 17:29:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:52,015 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-21 17:29:52,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:29:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-21 17:29:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 17:29:52,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:52,018 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] [2020-08-21 17:29:52,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:29:52,018 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-21 17:29:52,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:52,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571858903] [2020-08-21 17:29:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:29:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:52,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571858903] [2020-08-21 17:29:52,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:52,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:29:52,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937779793] [2020-08-21 17:29:52,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:29:52,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:29:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:29:52,182 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-21 17:29:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:52,952 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-21 17:29:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:29:52,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-21 17:29:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:52,959 INFO L225 Difference]: With dead ends: 1262 [2020-08-21 17:29:52,959 INFO L226 Difference]: Without dead ends: 814 [2020-08-21 17:29:52,962 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 [2020-08-21 17:29:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-21 17:29:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-21 17:29:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-21 17:29:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-21 17:29:53,063 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-21 17:29:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:53,064 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-21 17:29:53,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:29:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-21 17:29:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 17:29:53,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:53,068 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] [2020-08-21 17:29:53,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:29:53,069 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-21 17:29:53,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:53,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807507577] [2020-08-21 17:29:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:29:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 17:29:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 17:29:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 17:29:53,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807507577] [2020-08-21 17:29:53,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:53,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:29:53,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850030902] [2020-08-21 17:29:53,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:29:53,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:53,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:29:53,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:29:53,302 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-21 17:29:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:55,904 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-21 17:29:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 17:29:55,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-21 17:29:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:55,914 INFO L225 Difference]: With dead ends: 2276 [2020-08-21 17:29:55,914 INFO L226 Difference]: Without dead ends: 1165 [2020-08-21 17:29:55,920 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 [2020-08-21 17:29:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-21 17:29:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-21 17:29:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-21 17:29:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-21 17:29:56,028 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-21 17:29:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:56,029 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-21 17:29:56,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:29:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-21 17:29:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 17:29:56,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:56,032 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] [2020-08-21 17:29:56,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:29:56,033 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-21 17:29:56,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:56,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240698770] [2020-08-21 17:29:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:29:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:29:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 17:29:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 17:29:56,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240698770] [2020-08-21 17:29:56,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:56,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:29:56,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939076354] [2020-08-21 17:29:56,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:29:56,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:56,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:29:56,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:29:56,267 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-21 17:29:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:57,190 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-21 17:29:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:29:57,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-21 17:29:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:57,201 INFO L225 Difference]: With dead ends: 1198 [2020-08-21 17:29:57,202 INFO L226 Difference]: Without dead ends: 1195 [2020-08-21 17:29:57,203 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 [2020-08-21 17:29:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-21 17:29:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-21 17:29:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-21 17:29:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-21 17:29:57,331 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-21 17:29:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:57,332 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-21 17:29:57,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:29:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-21 17:29:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 17:29:57,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:57,336 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] [2020-08-21 17:29:57,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:29:57,336 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-21 17:29:57,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:57,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718190888] [2020-08-21 17:29:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:29:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:29:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:29:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:29:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:29:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 17:29:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:29:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:29:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 17:29:57,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718190888] [2020-08-21 17:29:57,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:57,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:29:57,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993150966] [2020-08-21 17:29:57,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:29:57,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:29:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:29:57,594 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-21 17:29:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:59,724 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-21 17:29:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 17:29:59,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-21 17:29:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:59,744 INFO L225 Difference]: With dead ends: 2245 [2020-08-21 17:29:59,745 INFO L226 Difference]: Without dead ends: 2242 [2020-08-21 17:29:59,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:29:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-21 17:30:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-21 17:30:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-21 17:30:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-21 17:30:00,032 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-21 17:30:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:30:00,032 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-21 17:30:00,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:30:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-21 17:30:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 17:30:00,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:30:00,041 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] [2020-08-21 17:30:00,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:30:00,042 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:30:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:30:00,042 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-21 17:30:00,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:30:00,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002541534] [2020-08-21 17:30:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:30:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:30:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:30:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:30:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:30:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:30:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:30:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:30:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:30:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:30:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:30:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:30:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 17:30:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:30:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:30:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-21 17:30:00,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002541534] [2020-08-21 17:30:00,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:30:00,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:30:00,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764992894] [2020-08-21 17:30:00,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:30:00,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:30:00,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:30:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:30:00,235 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-21 17:30:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:30:00,973 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-21 17:30:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:30:00,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-21 17:30:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:30:00,988 INFO L225 Difference]: With dead ends: 3453 [2020-08-21 17:30:00,988 INFO L226 Difference]: Without dead ends: 1708 [2020-08-21 17:30:01,005 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 [2020-08-21 17:30:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-21 17:30:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-21 17:30:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-21 17:30:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-21 17:30:01,209 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-21 17:30:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:30:01,210 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-21 17:30:01,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:30:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-21 17:30:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 17:30:01,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:30:01,216 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] [2020-08-21 17:30:01,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:30:01,217 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:30:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:30:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-21 17:30:01,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:30:01,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526194748] [2020-08-21 17:30:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:30:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:30:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:30:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:30:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:30:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:30:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 17:30:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:30:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:30:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 17:30:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 17:30:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:30:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:30:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:30:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 17:30:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:30:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:30:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:30:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-21 17:30:01,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526194748] [2020-08-21 17:30:01,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:30:01,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 17:30:01,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886384268] [2020-08-21 17:30:01,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:30:01,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:30:01,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:30:01,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:30:01,442 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-21 17:30:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:30:03,293 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-21 17:30:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 17:30:03,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-21 17:30:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:30:03,295 INFO L225 Difference]: With dead ends: 1974 [2020-08-21 17:30:03,295 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:30:03,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-21 17:30:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:30:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:30:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:30:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:30:03,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-21 17:30:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:30:03,309 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:30:03,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:30:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:30:03,310 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:30:03,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:30:03,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:30:03,906 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 17:30:04,026 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 17:30:06,039 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 121 [2020-08-21 17:30:10,387 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2020-08-21 17:30:11,641 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 17:30:12,745 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 17:30:13,923 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 17:30:14,225 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-21 17:30:14,343 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 17:30:15,373 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-21 17:30:15,564 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 17:30:16,891 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-21 17:30:17,727 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-21 17:30:18,548 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-21 17:30:18,958 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-21 17:30:20,068 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 17:30:20,202 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-21 17:30:20,362 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 17:30:23,691 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-21 17:30:23,867 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 17:30:24,424 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-21 17:30:24,821 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-21 17:30:25,175 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 17:30:25,398 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 17:30:29,732 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-21 17:30:29,882 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-21 17:30:31,932 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-21 17:30:33,125 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 165 DAG size of output: 101