/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/eca-rers2012/Problem17_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:31:18,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:31:18,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:31:18,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:31:18,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:31:18,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:31:18,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:31:18,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:31:18,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:31:18,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:31:18,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:31:18,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:31:18,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:31:18,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:31:18,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:31:18,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:31:18,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:31:18,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:31:18,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:31:18,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:31:18,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:31:18,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:31:18,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:31:18,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:31:18,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:31:18,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:31:18,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:31:18,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:31:18,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:31:18,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:31:18,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:31:18,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:31:18,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:31:18,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:31:18,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:31:18,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:31:18,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:31:18,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:31:18,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:31:18,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:31:18,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:31:18,541 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 [2020-10-28 13:31:18,597 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:31:18,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:31:18,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:31:18,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:31:18,603 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:31:18,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:31:18,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:31:18,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:31:18,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:31:18,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:31:18,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:31:18,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:31:18,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:31:18,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:31:18,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:31:18,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:31:18,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:31:18,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:31:18,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:31:18,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:31:18,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:31:18,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:31:18,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:31:18,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:31:18,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:31:18,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:31:18,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:31:18,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:31:18,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:31:18,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:31:19,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:31:19,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:31:19,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:31:19,092 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:31:19,092 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:31:19,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label07.c [2020-10-28 13:31:19,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc99d6c22/11d1dff045f8463a99d4e5c56f86f477/FLAGd4692d71a [2020-10-28 13:31:20,176 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:31:20,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label07.c [2020-10-28 13:31:20,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc99d6c22/11d1dff045f8463a99d4e5c56f86f477/FLAGd4692d71a [2020-10-28 13:31:20,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bc99d6c22/11d1dff045f8463a99d4e5c56f86f477 [2020-10-28 13:31:20,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:31:20,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:31:20,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:31:20,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:31:20,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:31:20,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:31:20" (1/1) ... [2020-10-28 13:31:20,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0cd31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:20, skipping insertion in model container [2020-10-28 13:31:20,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:31:20" (1/1) ... [2020-10-28 13:31:20,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:31:20,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:31:21,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:31:21,915 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:31:22,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:31:22,483 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:31:22,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22 WrapperNode [2020-10-28 13:31:22,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:31:22,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:31:22,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:31:22,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:31:22,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (1/1) ... [2020-10-28 13:31:22,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (1/1) ... [2020-10-28 13:31:22,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (1/1) ... [2020-10-28 13:31:22,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (1/1) ... [2020-10-28 13:31:22,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (1/1) ... [2020-10-28 13:31:22,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (1/1) ... [2020-10-28 13:31:22,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (1/1) ... [2020-10-28 13:31:22,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:31:22,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:31:22,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:31:22,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:31:22,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (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 [2020-10-28 13:31:22,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:31:22,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:31:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:31:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:31:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:31:22,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:31:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:31:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:31:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:31:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:31:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:31:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:31:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:31:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:31:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:31:22,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:31:22,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:31:22,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:31:22,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:31:22,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:31:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:31:32,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:31:32,622 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:31:32,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:31:32 BoogieIcfgContainer [2020-10-28 13:31:32,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:31:32,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:31:32,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:31:32,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:31:32,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:31:20" (1/3) ... [2020-10-28 13:31:32,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2881b8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:31:32, skipping insertion in model container [2020-10-28 13:31:32,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:31:22" (2/3) ... [2020-10-28 13:31:32,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2881b8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:31:32, skipping insertion in model container [2020-10-28 13:31:32,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:31:32" (3/3) ... [2020-10-28 13:31:32,638 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label07.c [2020-10-28 13:31:32,684 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:31:32,690 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:31:32,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:31:32,747 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:31:32,748 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:31:32,748 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:31:32,748 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:31:32,748 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:31:32,748 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:31:32,748 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:31:32,748 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:31:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-28 13:31:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 13:31:32,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:31:32,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:31:32,789 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:31:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:31:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash -379654902, now seen corresponding path program 1 times [2020-10-28 13:31:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:31:32,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297550310] [2020-10-28 13:31:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:31:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:31:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:31:33,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:31:33,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 13:31:33,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:31:33,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-28 13:31:33,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:31:33,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:31:33,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:31:33,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:31:33,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 13:31:33,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:31:33,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:31:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:31:33,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:31:33,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:31:33,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:31:33,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:31:33,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 13:31:33,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:31:33,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:31:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:31:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:31:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:31:33,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:31:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:31:33,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297550310] [2020-10-28 13:31:33,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:31:33,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 13:31:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278048004] [2020-10-28 13:31:33,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:31:33,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:31:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:31:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:31:33,986 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 5 states. [2020-10-28 13:31:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:31:50,986 INFO L93 Difference]: Finished difference Result 2174 states and 4022 transitions. [2020-10-28 13:31:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 13:31:50,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-28 13:31:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:31:51,022 INFO L225 Difference]: With dead ends: 2174 [2020-10-28 13:31:51,022 INFO L226 Difference]: Without dead ends: 1473 [2020-10-28 13:31:51,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:31:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-10-28 13:31:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1444. [2020-10-28 13:31:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-10-28 13:31:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2113 transitions. [2020-10-28 13:31:51,242 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2113 transitions. Word has length 34 [2020-10-28 13:31:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:31:51,243 INFO L481 AbstractCegarLoop]: Abstraction has 1444 states and 2113 transitions. [2020-10-28 13:31:51,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:31:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2113 transitions. [2020-10-28 13:31:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 13:31:51,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:31:51,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:31:51,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:31:51,253 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:31:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:31:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1595204042, now seen corresponding path program 1 times [2020-10-28 13:31:51,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:31:51,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921512163] [2020-10-28 13:31:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:31:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:31:51,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:31:51,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:31:52,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:31:52,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 13:31:52,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:31:52,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-28 13:31:52,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:31:52,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:31:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 13:31:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:31:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 13:31:52,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:31:52,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:31:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:31:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:31:52,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:31:52,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:31:52,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:31:52,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 13:31:52,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:31:52,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:31:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:31:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:31:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:31:52,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:31:52,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:31:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:31:52,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:31:52,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:31:53,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:31:53,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:31:53,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:31:53,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-28 13:31:53,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:31:53,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:31:53,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:31:53,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:31:53,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:31:53,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:31:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 13:31:53,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921512163] [2020-10-28 13:31:53,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:31:53,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:31:53,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317919638] [2020-10-28 13:31:53,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:31:53,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:31:53,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:31:53,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:31:53,308 INFO L87 Difference]: Start difference. First operand 1444 states and 2113 transitions. Second operand 6 states. [2020-10-28 13:32:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:32:06,484 INFO L93 Difference]: Finished difference Result 2902 states and 4246 transitions. [2020-10-28 13:32:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 13:32:06,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-28 13:32:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:32:06,496 INFO L225 Difference]: With dead ends: 2902 [2020-10-28 13:32:06,496 INFO L226 Difference]: Without dead ends: 1464 [2020-10-28 13:32:06,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:32:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2020-10-28 13:32:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2020-10-28 13:32:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2020-10-28 13:32:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2037 transitions. [2020-10-28 13:32:06,565 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2037 transitions. Word has length 105 [2020-10-28 13:32:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:32:06,565 INFO L481 AbstractCegarLoop]: Abstraction has 1464 states and 2037 transitions. [2020-10-28 13:32:06,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:32:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2037 transitions. [2020-10-28 13:32:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 13:32:06,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:32:06,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:32:06,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:32:06,569 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:32:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:32:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash 964249751, now seen corresponding path program 1 times [2020-10-28 13:32:06,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:32:06,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134644061] [2020-10-28 13:32:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:32:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:06,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:07,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:07,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 13:32:07,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-28 13:32:07,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:07,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:32:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-28 13:32:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 13:32:07,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:07,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:32:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:07,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:07,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:32:07,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:07,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:32:07,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:07,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:07,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:32:07,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:32:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:32:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:07,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:32:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:07,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:07,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:32:07,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:07,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 13:32:07,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:07,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:32:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:32:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 13:32:07,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:32:07,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134644061] [2020-10-28 13:32:07,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:32:07,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:32:07,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770727168] [2020-10-28 13:32:07,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:32:07,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:32:07,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:32:07,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:32:07,444 INFO L87 Difference]: Start difference. First operand 1464 states and 2037 transitions. Second operand 5 states. [2020-10-28 13:32:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:32:21,471 INFO L93 Difference]: Finished difference Result 2945 states and 4455 transitions. [2020-10-28 13:32:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:32:21,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-28 13:32:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:32:21,486 INFO L225 Difference]: With dead ends: 2945 [2020-10-28 13:32:21,486 INFO L226 Difference]: Without dead ends: 1920 [2020-10-28 13:32:21,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:32:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-10-28 13:32:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1918. [2020-10-28 13:32:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-28 13:32:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2631 transitions. [2020-10-28 13:32:21,554 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2631 transitions. Word has length 108 [2020-10-28 13:32:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:32:21,555 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2631 transitions. [2020-10-28 13:32:21,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:32:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2631 transitions. [2020-10-28 13:32:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 13:32:21,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:32:21,560 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:32:21,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:32:21,560 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:32:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:32:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1426152057, now seen corresponding path program 1 times [2020-10-28 13:32:21,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:32:21,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592717982] [2020-10-28 13:32:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:32:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:21,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:24,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:26,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:26,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 13:32:26,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:32:26,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 13:32:26,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:26,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:26,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:32:26,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-28 13:32:26,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:32:26,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:26,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:32:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:26,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:26,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:32:26,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:26,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:32:26,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:26,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:32:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:32:26,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:32:26,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:26,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:32:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:26,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:26,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:26,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:32:26,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:26,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 13:32:26,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:26,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:32:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:32:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 13:32:26,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:26,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-28 13:32:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:27,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:27,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 13:32:27,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:27,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 13:32:27,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:27,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:32:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:32:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 13:32:27,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:32:27,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592717982] [2020-10-28 13:32:27,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:32:27,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:32:27,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245348843] [2020-10-28 13:32:27,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:32:27,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:32:27,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:32:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:32:27,253 INFO L87 Difference]: Start difference. First operand 1918 states and 2631 transitions. Second operand 7 states. [2020-10-28 13:32:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:32:44,416 INFO L93 Difference]: Finished difference Result 4824 states and 6967 transitions. [2020-10-28 13:32:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:32:44,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-10-28 13:32:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:32:44,439 INFO L225 Difference]: With dead ends: 4824 [2020-10-28 13:32:44,439 INFO L226 Difference]: Without dead ends: 2885 [2020-10-28 13:32:44,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:32:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2020-10-28 13:32:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2393. [2020-10-28 13:32:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2393 states. [2020-10-28 13:32:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 2946 transitions. [2020-10-28 13:32:44,551 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 2946 transitions. Word has length 181 [2020-10-28 13:32:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:32:44,553 INFO L481 AbstractCegarLoop]: Abstraction has 2393 states and 2946 transitions. [2020-10-28 13:32:44,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:32:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 2946 transitions. [2020-10-28 13:32:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-28 13:32:44,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:32:44,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:32:44,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:32:44,563 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:32:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:32:44,564 INFO L82 PathProgramCache]: Analyzing trace with hash -647633594, now seen corresponding path program 1 times [2020-10-28 13:32:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:32:44,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910536057] [2020-10-28 13:32:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:32:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:44,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:44,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:45,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:45,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-28 13:32:45,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:32:45,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1307 [2020-10-28 13:32:45,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:45,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:45,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:32:45,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:32:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:32:45,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:46,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:32:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:46,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:32:46,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 13:32:46,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:46,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:46,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:32:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:32:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:32:46,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:32:46,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:32:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:46,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:46,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:46,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:32:46,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:46,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-28 13:32:46,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:46,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:32:46,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:32:46,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:32:46,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:32:46,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:32:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:46,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:46,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 13:32:46,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:46,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-28 13:32:46,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:46,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:46,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:32:46,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:32:46,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 13:32:46,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:32:46,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910536057] [2020-10-28 13:32:46,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:32:46,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:32:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153095791] [2020-10-28 13:32:46,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:32:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:32:46,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:32:46,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:32:46,674 INFO L87 Difference]: Start difference. First operand 2393 states and 2946 transitions. Second operand 7 states. [2020-10-28 13:33:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:33:07,048 INFO L93 Difference]: Finished difference Result 6168 states and 7881 transitions. [2020-10-28 13:33:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:33:07,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 194 [2020-10-28 13:33:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:33:07,073 INFO L225 Difference]: With dead ends: 6168 [2020-10-28 13:33:07,074 INFO L226 Difference]: Without dead ends: 3781 [2020-10-28 13:33:07,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:33:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2020-10-28 13:33:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 3760. [2020-10-28 13:33:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3760 states. [2020-10-28 13:33:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 4634 transitions. [2020-10-28 13:33:07,229 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 4634 transitions. Word has length 194 [2020-10-28 13:33:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:33:07,229 INFO L481 AbstractCegarLoop]: Abstraction has 3760 states and 4634 transitions. [2020-10-28 13:33:07,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:33:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 4634 transitions. [2020-10-28 13:33:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-28 13:33:07,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:33:07,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:33:07,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:33:07,233 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:33:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:33:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -109964574, now seen corresponding path program 1 times [2020-10-28 13:33:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:33:07,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695725409] [2020-10-28 13:33:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:33:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:07,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:09,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:11,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:11,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-28 13:33:11,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:33:11,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3977 [2020-10-28 13:33:11,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:11,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:11,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:33:11,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-28 13:33:11,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 13:33:11,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:11,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:33:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:11,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:11,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:33:11,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:11,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:33:11,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:11,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:33:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:33:11,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:11,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:33:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:11,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:11,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:33:11,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:11,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 13:33:11,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:11,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:11,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:33:11,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:33:11,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:11,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:33:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:11,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:11,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:11,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:33:11,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:11,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 13:33:11,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:11,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:33:11,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 13:33:11,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695725409] [2020-10-28 13:33:11,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:33:11,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:33:11,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266562230] [2020-10-28 13:33:11,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:33:11,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:33:11,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:33:11,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:33:11,744 INFO L87 Difference]: Start difference. First operand 3760 states and 4634 transitions. Second operand 5 states. [2020-10-28 13:33:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:33:27,935 INFO L93 Difference]: Finished difference Result 10601 states and 13272 transitions. [2020-10-28 13:33:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:33:27,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2020-10-28 13:33:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:33:27,990 INFO L225 Difference]: With dead ends: 10601 [2020-10-28 13:33:27,990 INFO L226 Difference]: Without dead ends: 6846 [2020-10-28 13:33:28,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:33:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2020-10-28 13:33:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 5971. [2020-10-28 13:33:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5971 states. [2020-10-28 13:33:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5971 states to 5971 states and 7201 transitions. [2020-10-28 13:33:28,216 INFO L78 Accepts]: Start accepts. Automaton has 5971 states and 7201 transitions. Word has length 196 [2020-10-28 13:33:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:33:28,217 INFO L481 AbstractCegarLoop]: Abstraction has 5971 states and 7201 transitions. [2020-10-28 13:33:28,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:33:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5971 states and 7201 transitions. [2020-10-28 13:33:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-28 13:33:28,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:33:28,223 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:33:28,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:33:28,224 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:33:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:33:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1928077928, now seen corresponding path program 1 times [2020-10-28 13:33:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:33:28,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318547042] [2020-10-28 13:33:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:33:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:28,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:28,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:33,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:33,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-28 13:33:33,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:33:33,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 13:33:33,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:33,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:33,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:33:33,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:33:33,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 13:33:33,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:33,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:33:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:33,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:33,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:33,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:33:33,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:33,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:33:33,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:33,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:33,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:33:33,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:33:33,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:33:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:33,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:33,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:33,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:33:33,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-28 13:33:33,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:33,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:33:33,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:33,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:33:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:33,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:33,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:33,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:33,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:33:33,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:33:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-28 13:33:33,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:33,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:33,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:33,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:33,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:33:33,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 13:33:34,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318547042] [2020-10-28 13:33:34,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:33:34,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:33:34,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502570586] [2020-10-28 13:33:34,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:33:34,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:33:34,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:33:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:33:34,008 INFO L87 Difference]: Start difference. First operand 5971 states and 7201 transitions. Second operand 5 states. [2020-10-28 13:33:34,747 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 13:33:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:33:52,691 INFO L93 Difference]: Finished difference Result 12813 states and 15817 transitions. [2020-10-28 13:33:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:33:52,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2020-10-28 13:33:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:33:52,733 INFO L225 Difference]: With dead ends: 12813 [2020-10-28 13:33:52,733 INFO L226 Difference]: Without dead ends: 6848 [2020-10-28 13:33:52,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:33:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2020-10-28 13:33:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6839. [2020-10-28 13:33:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6839 states. [2020-10-28 13:33:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6839 states to 6839 states and 8388 transitions. [2020-10-28 13:33:52,948 INFO L78 Accepts]: Start accepts. Automaton has 6839 states and 8388 transitions. Word has length 207 [2020-10-28 13:33:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:33:52,949 INFO L481 AbstractCegarLoop]: Abstraction has 6839 states and 8388 transitions. [2020-10-28 13:33:52,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:33:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 6839 states and 8388 transitions. [2020-10-28 13:33:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-28 13:33:52,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:33:52,957 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:33:52,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:33:52,957 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:33:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:33:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash -673036932, now seen corresponding path program 1 times [2020-10-28 13:33:52,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:33:52,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513213066] [2020-10-28 13:33:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:33:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:53,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:53,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:53,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-28 13:33:53,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:53,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-28 13:33:53,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:53,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:33:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 13:33:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 13:33:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:54,079 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:33:54,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:33:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:54,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:54,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:33:54,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:54,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:33:54,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:54,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:54,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:33:54,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:54,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:33:54,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:33:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:54,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:54,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:54,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:33:54,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:54,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 13:33:54,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:54,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:54,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:33:54,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:54,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:33:54,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:54,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:33:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:54,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:54,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:33:54,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 13:33:54,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:54,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:33:54,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:54,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:33:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:54,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:54,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:54,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:33:54,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:54,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 13:33:54,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:54,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:33:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:33:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:33:54,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-28 13:33:54,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513213066] [2020-10-28 13:33:54,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:33:54,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:33:54,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767845775] [2020-10-28 13:33:54,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:33:54,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:33:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:33:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:33:54,737 INFO L87 Difference]: Start difference. First operand 6839 states and 8388 transitions. Second operand 7 states. [2020-10-28 13:33:55,993 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:34:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:34:19,430 INFO L93 Difference]: Finished difference Result 16570 states and 20728 transitions. [2020-10-28 13:34:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:34:19,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 278 [2020-10-28 13:34:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:34:19,484 INFO L225 Difference]: With dead ends: 16570 [2020-10-28 13:34:19,484 INFO L226 Difference]: Without dead ends: 9278 [2020-10-28 13:34:19,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:34:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2020-10-28 13:34:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 8769. [2020-10-28 13:34:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8769 states. [2020-10-28 13:34:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 10924 transitions. [2020-10-28 13:34:19,741 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 10924 transitions. Word has length 278 [2020-10-28 13:34:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:34:19,742 INFO L481 AbstractCegarLoop]: Abstraction has 8769 states and 10924 transitions. [2020-10-28 13:34:19,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:34:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 10924 transitions. [2020-10-28 13:34:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-28 13:34:19,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:34:19,748 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:34:19,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:34:19,749 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:34:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:34:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash -651103999, now seen corresponding path program 1 times [2020-10-28 13:34:19,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:34:19,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104313974] [2020-10-28 13:34:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:34:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:19,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:20,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:22,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:22,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-28 13:34:22,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:34:22,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2311 [2020-10-28 13:34:22,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:22,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:22,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:34:22,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 13:34:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 13:34:22,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:22,321 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:34:22,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:34:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:22,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:22,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:22,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:34:22,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 13:34:22,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:22,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:34:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:34:22,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:34:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:22,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:22,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:34:22,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 13:34:22,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:22,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:34:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:34:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:34:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:22,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:22,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:34:22,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:22,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 13:34:22,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:22,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:34:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:34:22,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:22,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:34:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:22,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:22,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:22,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 13:34:22,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 13:34:22,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:22,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:34:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:34:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:34:22,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 229 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-28 13:34:23,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104313974] [2020-10-28 13:34:23,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:34:23,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:34:23,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225720927] [2020-10-28 13:34:23,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:34:23,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:34:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:34:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:34:23,061 INFO L87 Difference]: Start difference. First operand 8769 states and 10924 transitions. Second operand 7 states. [2020-10-28 13:34:26,979 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:34:27,775 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 13:34:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:34:41,537 INFO L93 Difference]: Finished difference Result 22209 states and 29032 transitions. [2020-10-28 13:34:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:34:41,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 283 [2020-10-28 13:34:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:34:41,597 INFO L225 Difference]: With dead ends: 22209 [2020-10-28 13:34:41,597 INFO L226 Difference]: Without dead ends: 13006 [2020-10-28 13:34:41,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:34:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13006 states. [2020-10-28 13:34:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13006 to 11948. [2020-10-28 13:34:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11948 states. [2020-10-28 13:34:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11948 states to 11948 states and 14544 transitions. [2020-10-28 13:34:42,143 INFO L78 Accepts]: Start accepts. Automaton has 11948 states and 14544 transitions. Word has length 283 [2020-10-28 13:34:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:34:42,144 INFO L481 AbstractCegarLoop]: Abstraction has 11948 states and 14544 transitions. [2020-10-28 13:34:42,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:34:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11948 states and 14544 transitions. [2020-10-28 13:34:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-28 13:34:42,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:34:42,152 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:34:42,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:34:42,152 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:34:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:34:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1959290723, now seen corresponding path program 1 times [2020-10-28 13:34:42,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:34:42,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340022187] [2020-10-28 13:34:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:34:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:42,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:46,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:46,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 13:34:46,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:34:46,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4231 [2020-10-28 13:34:46,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:46,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:46,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:34:46,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:34:46,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:34:46,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:46,692 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:34:46,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:34:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:46,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:34:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:34:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:46,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:34:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:46,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:34:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:46,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:34:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:46,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:46,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:46,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:34:46,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:46,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 13:34:46,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:46,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:46,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:34:46,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:46,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:34:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:46,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:34:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:46,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:47,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:47,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 13:34:47,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:47,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-28 13:34:47,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:47,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:34:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:34:47,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 13:34:47,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:47,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-28 13:34:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:47,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:47,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:47,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:34:47,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:47,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 13:34:47,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:47,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:34:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 13:34:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:34:47,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 166 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-28 13:34:47,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340022187] [2020-10-28 13:34:47,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:34:47,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:34:47,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150568517] [2020-10-28 13:34:47,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:34:47,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:34:47,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:34:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:34:47,674 INFO L87 Difference]: Start difference. First operand 11948 states and 14544 transitions. Second operand 7 states. [2020-10-28 13:34:48,648 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 13:34:54,692 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-28 13:35:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:35:03,269 INFO L93 Difference]: Finished difference Result 25326 states and 30839 transitions. [2020-10-28 13:35:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:35:03,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 301 [2020-10-28 13:35:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:35:03,319 INFO L225 Difference]: With dead ends: 25326 [2020-10-28 13:35:03,319 INFO L226 Difference]: Without dead ends: 13384 [2020-10-28 13:35:03,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:35:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2020-10-28 13:35:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 13318. [2020-10-28 13:35:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13318 states. [2020-10-28 13:35:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13318 states to 13318 states and 16179 transitions. [2020-10-28 13:35:03,746 INFO L78 Accepts]: Start accepts. Automaton has 13318 states and 16179 transitions. Word has length 301 [2020-10-28 13:35:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:35:03,746 INFO L481 AbstractCegarLoop]: Abstraction has 13318 states and 16179 transitions. [2020-10-28 13:35:03,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:35:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13318 states and 16179 transitions. [2020-10-28 13:35:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-28 13:35:03,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:35:03,755 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-10-28 13:35:03,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:35:03,755 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:35:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:35:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 899831093, now seen corresponding path program 1 times [2020-10-28 13:35:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:35:03,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085779211] [2020-10-28 13:35:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:35:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:03,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking...