/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/ms4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:39:02,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:39:02,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:39:02,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:39:02,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:39:02,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:39:02,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:39:02,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:39:02,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:39:02,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:39:02,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:39:02,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:39:02,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:39:02,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:39:02,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:39:02,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:39:02,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:39:02,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:39:02,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:39:02,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:39:02,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:39:02,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:39:02,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:39:02,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:39:02,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:39:02,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:39:02,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:39:02,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:39:02,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:39:02,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:39:02,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:39:02,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:39:02,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:39:02,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:39:02,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:39:02,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:39:02,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:39:02,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:39:02,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:39:02,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:39:02,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:39:02,535 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 [2020-10-27 14:39:02,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:39:02,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:39:02,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:39:02,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:39:02,593 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:39:02,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:39:02,594 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:39:02,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:39:02,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:39:02,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:39:02,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:39:02,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:39:02,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:39:02,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:39:02,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:39:02,597 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:39:02,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:39:02,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:39:02,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:39:02,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:39:02,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:39:02,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:39:02,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:39:02,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:39:02,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:39:02,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:39:02,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:39:02,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:39:02,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:39:02,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:39:03,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:39:03,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:39:03,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:39:03,106 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:39:03,107 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:39:03,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms4.c [2020-10-27 14:39:03,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9694e21f6/8ba839da18e64a6fa1aca6e9e6ad22a6/FLAGe3a6f7381 [2020-10-27 14:39:03,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:39:03,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms4.c [2020-10-27 14:39:03,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9694e21f6/8ba839da18e64a6fa1aca6e9e6ad22a6/FLAGe3a6f7381 [2020-10-27 14:39:04,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9694e21f6/8ba839da18e64a6fa1aca6e9e6ad22a6 [2020-10-27 14:39:04,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:39:04,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:39:04,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:39:04,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:39:04,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:39:04,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d846b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04, skipping insertion in model container [2020-10-27 14:39:04,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:39:04,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:39:04,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:39:04,504 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:39:04,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:39:04,549 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:39:04,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04 WrapperNode [2020-10-27 14:39:04,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:39:04,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:39:04,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:39:04,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:39:04,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... [2020-10-27 14:39:04,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:39:04,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:39:04,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:39:04,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:39:04,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:39:04,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:39:04,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:39:04,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:39:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:39:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:39:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:39:04,681 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:39:04,681 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:39:04,681 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:39:04,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:39:04,682 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:39:04,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:39:04,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:39:04,682 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:39:04,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:39:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:39:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:39:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:39:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:39:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:39:04,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:39:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:39:05,002 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:39:05,002 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:39:05,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:39:05 BoogieIcfgContainer [2020-10-27 14:39:05,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:39:05,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:39:05,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:39:05,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:39:05,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:39:04" (1/3) ... [2020-10-27 14:39:05,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202914d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:39:05, skipping insertion in model container [2020-10-27 14:39:05,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:39:04" (2/3) ... [2020-10-27 14:39:05,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202914d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:39:05, skipping insertion in model container [2020-10-27 14:39:05,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:39:05" (3/3) ... [2020-10-27 14:39:05,016 INFO L111 eAbstractionObserver]: Analyzing ICFG ms4.c [2020-10-27 14:39:05,030 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:39:05,035 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:39:05,065 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:39:05,109 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:39:05,109 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:39:05,109 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:39:05,109 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:39:05,110 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:39:05,110 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:39:05,110 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:39:05,110 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:39:05,130 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 14:39:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:39:05,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:05,138 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] [2020-10-27 14:39:05,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-27 14:39:05,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:05,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502208653] [2020-10-27 14:39:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:05,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:05,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:39:05,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:05,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-27 14:39:05,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:05,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:05,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:39:06,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:06,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:06,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:06,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:06,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:39:06,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:06,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:06,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:06,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:06,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:06,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:06,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:06,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:06,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:39:06,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:06,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:06,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:39:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:06,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:06,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502208653] [2020-10-27 14:39:06,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:06,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:39:06,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616016625] [2020-10-27 14:39:06,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:39:06,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:39:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:39:06,129 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-27 14:39:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:06,323 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-27 14:39:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:39:06,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-27 14:39:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:06,334 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:39:06,334 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:39:06,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:39:06,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:39:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 14:39:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:39:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 14:39:06,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-10-27 14:39:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:06,412 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 14:39:06,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:39:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 14:39:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:39:06,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:06,414 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] [2020-10-27 14:39:06,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:39:06,415 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1173980304, now seen corresponding path program 1 times [2020-10-27 14:39:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:06,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806968484] [2020-10-27 14:39:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:06,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:39:06,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:06,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 14:39:06,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:06,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:39:06,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:39:06,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:06,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:06,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:06,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:39:06,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:06,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:06,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:06,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:06,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:06,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:06,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:06,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:39:06,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:06,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806968484] [2020-10-27 14:39:06,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:06,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:39:06,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3981584] [2020-10-27 14:39:06,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:39:06,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:06,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:39:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:39:06,787 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-27 14:39:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:06,946 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-27 14:39:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:39:06,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 14:39:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:06,948 INFO L225 Difference]: With dead ends: 39 [2020-10-27 14:39:06,948 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:39:06,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:39:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:39:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 14:39:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:39:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 14:39:06,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-27 14:39:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:06,960 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 14:39:06,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:39:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 14:39:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:39:06,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:06,962 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] [2020-10-27 14:39:06,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:39:06,962 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-27 14:39:06,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:06,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586926514] [2020-10-27 14:39:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:07,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:39:07,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:07,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-27 14:39:07,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:07,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:39:07,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:39:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:39:07,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:39:07,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:07,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:07,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:07,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:39:07,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:07,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:07,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:07,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:07,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:07,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:07,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:07,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:07,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:07,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:07,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586926514] [2020-10-27 14:39:07,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:07,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 14:39:07,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903262087] [2020-10-27 14:39:07,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:39:07,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:07,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:39:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:39:07,897 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-27 14:39:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:08,156 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 14:39:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:39:08,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 14:39:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:08,158 INFO L225 Difference]: With dead ends: 38 [2020-10-27 14:39:08,158 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:39:08,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:39:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:39:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 14:39:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:39:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:39:08,167 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-27 14:39:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:08,168 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:39:08,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:39:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:39:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:39:08,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:08,169 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] [2020-10-27 14:39:08,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:39:08,169 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-27 14:39:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:08,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101661] [2020-10-27 14:39:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:08,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:09,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:39:09,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:09,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-10-27 14:39:09,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:09,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:09,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:39:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:39:09,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:09,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:09,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:09,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:09,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:09,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:39:09,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:09,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:09,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:09,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:09,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:09,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:09,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:09,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:09,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:09,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:09,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:09,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:09,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:09,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101661] [2020-10-27 14:39:09,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:09,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:39:09,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486866168] [2020-10-27 14:39:09,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:39:09,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:09,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:39:09,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:39:09,130 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-27 14:39:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:09,206 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-27 14:39:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:39:09,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 14:39:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:09,208 INFO L225 Difference]: With dead ends: 44 [2020-10-27 14:39:09,208 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:39:09,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:39:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:39:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 14:39:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:39:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:39:09,216 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-27 14:39:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:09,216 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:39:09,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:39:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:39:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:39:09,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:09,217 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:39:09,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:39:09,218 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1207722736, now seen corresponding path program 1 times [2020-10-27 14:39:09,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:09,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238437374] [2020-10-27 14:39:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:12,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:39:12,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:39:12,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2891 [2020-10-27 14:39:12,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:12,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:39:12,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:12,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:39:12,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:12,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:12,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:12,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:12,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:12,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:12,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:12,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:12,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:12,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:12,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:12,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238437374] [2020-10-27 14:39:12,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:12,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:39:12,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985105143] [2020-10-27 14:39:12,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:39:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:39:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:39:12,723 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 15 states. [2020-10-27 14:39:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:13,505 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-27 14:39:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:39:13,506 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-27 14:39:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:13,507 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:39:13,507 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:39:13,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:39:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:39:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-27 14:39:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:39:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-27 14:39:13,516 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-10-27 14:39:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:13,516 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-27 14:39:13,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:39:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-27 14:39:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:39:13,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:13,518 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:39:13,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:39:13,518 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash 773864071, now seen corresponding path program 2 times [2020-10-27 14:39:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:13,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752971256] [2020-10-27 14:39:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:13,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:15,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:18,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:39:18,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:39:18,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:39:18,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:39:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:39:18,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:18,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:18,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:18,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:18,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:18,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:18,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:18,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:18,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:18,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:18,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:18,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:18,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:18,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:18,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:18,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:18,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:18,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:39:18,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752971256] [2020-10-27 14:39:18,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:18,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:39:18,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737804486] [2020-10-27 14:39:18,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:39:18,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:39:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:39:18,718 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-10-27 14:39:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:19,048 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-27 14:39:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:39:19,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 14:39:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:19,050 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:39:19,050 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:39:19,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:39:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:39:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-27 14:39:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:39:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-27 14:39:19,067 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-10-27 14:39:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:19,070 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-27 14:39:19,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:39:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-27 14:39:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:39:19,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:19,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:39:19,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:39:19,073 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 3 times [2020-10-27 14:39:19,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:19,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484152035] [2020-10-27 14:39:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:24,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:39:24,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:39:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:39:24,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:39:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:24,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:24,544 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-27 14:39:24,803 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 14:39:25,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:25,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:25,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:25,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:25,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:25,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:25,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:25,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:25,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:25,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:25,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:25,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:25,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484152035] [2020-10-27 14:39:25,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:25,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:39:25,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022143388] [2020-10-27 14:39:25,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:39:25,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:25,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:39:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:39:25,413 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 19 states. [2020-10-27 14:39:25,834 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-27 14:39:26,247 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-27 14:39:26,655 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-27 14:39:26,899 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 14:39:27,243 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-10-27 14:39:27,559 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-27 14:39:27,878 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-27 14:39:28,229 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 14:39:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:28,990 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-27 14:39:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:39:28,991 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-27 14:39:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:28,992 INFO L225 Difference]: With dead ends: 54 [2020-10-27 14:39:28,993 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 14:39:28,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:39:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 14:39:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-10-27 14:39:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:39:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:39:29,010 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 35 [2020-10-27 14:39:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:29,011 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:39:29,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:39:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:39:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:39:29,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:29,012 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 14:39:29,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:39:29,012 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1842075536, now seen corresponding path program 4 times [2020-10-27 14:39:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:29,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791237548] [2020-10-27 14:39:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:29,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:34,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:39:34,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:39:34,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:39:34,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:34,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:39:34,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:39:34,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:39:34,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:34,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:34,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:34,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:34,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:34,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:34,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:34,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:34,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:34,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:34,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:34,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:34,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:39:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791237548] [2020-10-27 14:39:34,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:34,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:39:34,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824706895] [2020-10-27 14:39:34,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:39:34,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:39:34,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:39:34,115 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 6 states. [2020-10-27 14:39:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:34,240 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-27 14:39:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:39:34,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-27 14:39:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:34,241 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:39:34,241 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:39:34,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:39:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:39:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 14:39:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:39:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 14:39:34,258 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2020-10-27 14:39:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:34,258 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 14:39:34,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:39:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 14:39:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:39:34,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:34,260 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-27 14:39:34,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:39:34,261 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2100240974, now seen corresponding path program 5 times [2020-10-27 14:39:34,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:34,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526179923] [2020-10-27 14:39:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:34,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:37,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:39,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:39:39,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:39:39,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:39:39,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:39:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:39:39,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:39,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:39,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:39,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:39,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:39,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:39,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:39,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:39,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:39,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:39,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:39,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:39,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:39,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:39,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:39,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:39,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:39,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:39,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:39,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:39,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:39,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526179923] [2020-10-27 14:39:39,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:39,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:39:39,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80698736] [2020-10-27 14:39:39,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:39:39,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:39:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:39:39,423 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2020-10-27 14:39:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:39,671 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-27 14:39:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:39:39,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-27 14:39:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:39,672 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:39:39,673 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:39:39,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:39:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:39:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 14:39:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:39:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 14:39:39,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-27 14:39:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:39,681 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 14:39:39,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:39:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 14:39:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:39:39,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:39,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:39,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:39:39,682 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:39,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 6 times [2020-10-27 14:39:39,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:39,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380150552] [2020-10-27 14:39:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:39,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:41,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:44,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:44,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:39:44,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:39:44,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:39:44,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:39:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:44,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:45,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:45,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:45,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:45,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:45,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:45,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:45,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:45,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:45,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:45,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:45,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:45,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:45,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:45,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:45,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:45,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:45,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:45,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:39:45,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380150552] [2020-10-27 14:39:45,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:45,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:39:45,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060645026] [2020-10-27 14:39:45,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:39:45,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:45,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:39:45,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:39:45,108 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-10-27 14:39:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:45,964 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-27 14:39:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:39:45,964 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 14:39:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:45,965 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:39:45,965 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:39:45,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:39:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:39:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-27 14:39:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:39:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 14:39:45,981 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-27 14:39:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:45,982 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 14:39:45,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:39:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 14:39:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:39:45,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:45,986 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:45,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:39:45,986 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:45,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 7 times [2020-10-27 14:39:45,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:45,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923321962] [2020-10-27 14:39:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:46,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:47,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:48,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:48,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:51,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:39:51,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:39:51,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 14:39:51,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:51,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:39:51,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:51,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:39:51,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:52,079 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-27 14:39:52,330 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-27 14:39:52,508 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-27 14:39:53,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:53,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:53,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:53,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:53,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:53,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:53,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:53,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:53,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:53,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:53,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:53,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:53,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:53,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923321962] [2020-10-27 14:39:53,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:53,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:39:53,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903634030] [2020-10-27 14:39:53,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:39:53,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:53,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:39:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:39:53,473 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 23 states. [2020-10-27 14:39:54,237 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 14:39:54,531 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-27 14:39:54,711 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 14:39:55,323 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 152 [2020-10-27 14:39:55,616 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-27 14:39:55,937 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2020-10-27 14:39:56,180 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 14:39:56,474 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 14:39:57,192 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 14:39:57,560 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 14:39:57,957 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 14:39:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:58,044 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-27 14:39:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:39:58,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-27 14:39:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:58,047 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:39:58,047 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:39:58,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:39:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:39:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 14:39:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:39:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-27 14:39:58,058 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2020-10-27 14:39:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:58,058 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-27 14:39:58,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:39:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-27 14:39:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:39:58,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:58,059 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:58,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:39:58,060 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 8 times [2020-10-27 14:39:58,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:58,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610087008] [2020-10-27 14:39:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:58,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:59,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:01,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:03,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:03,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:40:03,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:40:03,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:40:03,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:03,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:40:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:40:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:40:03,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:04,035 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 41 [2020-10-27 14:40:04,739 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 48 [2020-10-27 14:40:06,634 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 258 DAG size of output: 94 [2020-10-27 14:40:07,424 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 79 [2020-10-27 14:40:08,659 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 235 DAG size of output: 89 [2020-10-27 14:40:09,263 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2020-10-27 14:40:09,661 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-27 14:40:10,116 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2020-10-27 14:40:10,923 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 79 [2020-10-27 14:40:11,588 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 75 [2020-10-27 14:40:12,101 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 66 [2020-10-27 14:40:12,614 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 58 [2020-10-27 14:40:13,066 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 48 [2020-10-27 14:40:13,511 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2020-10-27 14:40:13,843 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-10-27 14:40:14,290 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2020-10-27 14:40:14,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:14,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:14,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:14,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:14,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:14,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:14,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:14,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610087008] [2020-10-27 14:40:14,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:14,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:40:14,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812909556] [2020-10-27 14:40:14,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:40:14,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:40:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:40:14,978 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 27 states. [2020-10-27 14:40:15,487 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-27 14:40:15,731 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-27 14:40:16,155 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-27 14:40:16,828 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 113 [2020-10-27 14:40:21,447 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-27 14:40:28,660 WARN L193 SmtUtils]: Spent 6.82 s on a formula simplification. DAG size of input: 210 DAG size of output: 108 [2020-10-27 14:40:35,626 WARN L193 SmtUtils]: Spent 6.81 s on a formula simplification. DAG size of input: 133 DAG size of output: 124 [2020-10-27 14:40:38,680 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 281 DAG size of output: 255 [2020-10-27 14:40:39,180 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 14:40:40,089 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 138 [2020-10-27 14:40:41,438 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 176 DAG size of output: 167 [2020-10-27 14:40:42,046 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-10-27 14:40:42,421 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 14:40:42,748 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-27 14:40:43,066 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 14:40:44,296 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 160 DAG size of output: 158 [2020-10-27 14:40:44,486 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 14:40:45,617 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 162 DAG size of output: 160 [2020-10-27 14:40:46,944 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 156 [2020-10-27 14:40:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:47,054 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-27 14:40:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:40:47,055 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-27 14:40:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:47,056 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:40:47,056 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 14:40:47,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:40:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 14:40:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 14:40:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:40:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 14:40:47,073 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2020-10-27 14:40:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:47,074 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 14:40:47,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:40:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 14:40:47,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:40:47,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:47,075 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:47,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:40:47,076 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1913889322, now seen corresponding path program 9 times [2020-10-27 14:40:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:47,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492012635] [2020-10-27 14:40:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:40:52,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 14:40:52,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:40:52,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:40:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:52,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:40:52,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:52,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:52,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:52,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:52,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:52,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:52,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:52,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:52,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:52,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:40:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492012635] [2020-10-27 14:40:52,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:52,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:40:52,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63757229] [2020-10-27 14:40:52,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:40:52,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:40:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:40:52,778 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-10-27 14:40:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:54,218 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 14:40:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:40:54,220 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-27 14:40:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:54,221 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:40:54,221 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:40:54,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:40:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:40:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 14:40:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:40:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 14:40:54,242 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-27 14:40:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:54,242 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 14:40:54,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:40:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 14:40:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:40:54,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:54,244 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:54,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:40:54,244 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash -527027768, now seen corresponding path program 10 times [2020-10-27 14:40:54,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:54,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096091600] [2020-10-27 14:40:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:54,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:54,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:54,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:55,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:57,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:58,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:59,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:40:59,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:40:59,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:40:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:40:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:40:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:00,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:00,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:00,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:00,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:00,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:00,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:00,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:00,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:00,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:00,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:00,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:41:00,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096091600] [2020-10-27 14:41:00,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:00,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:41:00,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029691412] [2020-10-27 14:41:00,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:41:00,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:41:00,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:41:00,099 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-27 14:41:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:01,852 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-27 14:41:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:41:01,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-27 14:41:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:01,854 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:41:01,854 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:41:01,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:41:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:41:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-27 14:41:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:41:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 14:41:01,869 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-27 14:41:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:01,869 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 14:41:01,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:41:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 14:41:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:41:01,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:01,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:01,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:41:01,871 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:01,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1196207642, now seen corresponding path program 11 times [2020-10-27 14:41:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:01,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271853815] [2020-10-27 14:41:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:03,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:04,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:06,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:41:06,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:41:06,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:41:06,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:06,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:41:06,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:41:06,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:41:06,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:10,645 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 19 [2020-10-27 14:41:11,102 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 30 [2020-10-27 14:41:16,273 WARN L193 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 345 DAG size of output: 26 [2020-10-27 14:41:22,361 WARN L193 SmtUtils]: Spent 5.70 s on a formula simplification. DAG size of input: 413 DAG size of output: 60 [2020-10-27 14:41:33,102 WARN L193 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 433 DAG size of output: 75 [2020-10-27 14:41:34,493 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 336 DAG size of output: 77 [2020-10-27 14:41:35,767 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 293 DAG size of output: 84 [2020-10-27 14:41:36,578 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 70 [2020-10-27 14:41:37,947 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 223 DAG size of output: 102 [2020-10-27 14:41:38,709 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2020-10-27 14:41:39,161 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-27 14:41:39,669 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-10-27 14:41:40,864 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 123 [2020-10-27 14:41:41,969 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 118 [2020-10-27 14:41:42,793 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 87 [2020-10-27 14:41:43,507 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 85 [2020-10-27 14:41:44,325 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 65 [2020-10-27 14:41:44,896 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2020-10-27 14:41:45,443 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 45 [2020-10-27 14:41:45,855 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 37 [2020-10-27 14:41:46,256 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-10-27 14:41:46,625 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2020-10-27 14:41:47,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:47,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:47,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:47,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:47,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:47,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:47,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:47,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:47,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:47,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:47,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:41:47,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271853815] [2020-10-27 14:41:47,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:47,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:41:47,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417987000] [2020-10-27 14:41:47,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:41:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:47,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:41:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=858, Unknown=2, NotChecked=0, Total=930 [2020-10-27 14:41:47,890 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 31 states. [2020-10-27 14:41:53,692 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 356 DAG size of output: 233 [2020-10-27 14:42:04,250 WARN L193 SmtUtils]: Spent 9.84 s on a formula simplification. DAG size of input: 418 DAG size of output: 238 [2020-10-27 14:42:07,985 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 209 DAG size of output: 162 [2020-10-27 14:42:14,848 WARN L193 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 314 DAG size of output: 127 [2020-10-27 14:42:29,228 WARN L193 SmtUtils]: Spent 13.82 s on a formula simplification. DAG size of input: 464 DAG size of output: 390 [2020-10-27 14:42:41,624 WARN L193 SmtUtils]: Spent 11.79 s on a formula simplification. DAG size of input: 407 DAG size of output: 285 [2020-10-27 14:42:53,940 WARN L193 SmtUtils]: Spent 11.87 s on a formula simplification. DAG size of input: 457 DAG size of output: 286