/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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:36:04,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:36:04,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:36:04,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:36:04,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:36:04,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:36:04,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:36:04,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:36:04,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:36:04,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:36:04,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:36:04,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:36:04,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:36:04,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:36:04,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:36:04,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:36:04,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:36:04,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:36:04,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:36:04,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:36:04,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:36:04,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:36:04,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:36:04,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:36:04,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:36:04,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:36:04,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:36:04,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:36:04,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:36:04,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:36:04,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:36:04,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:36:04,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:36:04,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:36:04,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:36:04,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:36:04,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:36:04,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:36:04,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:36:04,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:36:04,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:36:04,430 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 13:36:04,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:36:04,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:36:04,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:36:04,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:36:04,500 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:36:04,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:36:04,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:36:04,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:36:04,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:36:04,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:36:04,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:36:04,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:36:04,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:36:04,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:36:04,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:36:04,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:36:04,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:36:04,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:36:04,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:36:04,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:36:04,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:36:04,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:36:04,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:36:04,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:36:04,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:36:04,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:36:04,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:36:04,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:36:04,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:36:04,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:36:04,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:36:05,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:36:05,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:36:05,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:36:05,047 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:36:05,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label22.c [2020-10-28 13:36:05,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a6862833/3ed0b296fa334548a532f2683ead126f/FLAGe3d7f08ee [2020-10-28 13:36:06,222 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:36:06,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label22.c [2020-10-28 13:36:06,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a6862833/3ed0b296fa334548a532f2683ead126f/FLAGe3d7f08ee [2020-10-28 13:36:06,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a6862833/3ed0b296fa334548a532f2683ead126f [2020-10-28 13:36:06,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:36:06,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:36:06,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:36:06,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:36:06,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:36:06,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:36:06" (1/1) ... [2020-10-28 13:36:06,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6b92bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:06, skipping insertion in model container [2020-10-28 13:36:06,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:36:06" (1/1) ... [2020-10-28 13:36:06,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:36:06,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:36:08,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:36:08,150 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:36:08,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:36:08,799 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:36:08,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08 WrapperNode [2020-10-28 13:36:08,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:36:08,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:36:08,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:36:08,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:36:08,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (1/1) ... [2020-10-28 13:36:08,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (1/1) ... [2020-10-28 13:36:08,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (1/1) ... [2020-10-28 13:36:08,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (1/1) ... [2020-10-28 13:36:09,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (1/1) ... [2020-10-28 13:36:09,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (1/1) ... [2020-10-28 13:36:09,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (1/1) ... [2020-10-28 13:36:09,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:36:09,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:36:09,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:36:09,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:36:09,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (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 13:36:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:36:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:36:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:36:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:36:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:36:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:36:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:36:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:36:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:36:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:36:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:36:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:36:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:36:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:36:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:36:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:36:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:36:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:36:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:36:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:36:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:36:19,012 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:36:19,012 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:36:19,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:36:19 BoogieIcfgContainer [2020-10-28 13:36:19,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:36:19,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:36:19,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:36:19,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:36:19,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:36:06" (1/3) ... [2020-10-28 13:36:19,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c41bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:36:19, skipping insertion in model container [2020-10-28 13:36:19,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:36:08" (2/3) ... [2020-10-28 13:36:19,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c41bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:36:19, skipping insertion in model container [2020-10-28 13:36:19,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:36:19" (3/3) ... [2020-10-28 13:36:19,033 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label22.c [2020-10-28 13:36:19,051 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:36:19,059 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:36:19,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:36:19,125 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:36:19,126 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:36:19,126 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:36:19,126 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:36:19,126 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:36:19,126 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:36:19,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:36:19,127 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:36:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-28 13:36:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 13:36:19,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:36:19,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:36:19,172 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:36:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:36:19,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1837215466, now seen corresponding path program 1 times [2020-10-28 13:36:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:36:19,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696275401] [2020-10-28 13:36:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:36:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:36:19,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:20,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:36:20,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 13:36:20,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:36:20,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-28 13:36:20,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:36:20,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:36:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:36:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:36:20,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 13:36:20,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:36:20,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:36:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:36:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:20,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:36:20,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:36:20,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:36:20,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 13:36:20,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:36:20,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:36:20,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:36:20,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:36:20,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:36:20,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:36:20,495 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 13:36:20,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696275401] [2020-10-28 13:36:20,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:36:20,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:36:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776767652] [2020-10-28 13:36:20,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:36:20,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:36:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:36:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:36:20,537 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-28 13:36:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:36:38,361 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-28 13:36:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:36:38,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 13:36:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:36:38,390 INFO L225 Difference]: With dead ends: 1694 [2020-10-28 13:36:38,391 INFO L226 Difference]: Without dead ends: 1010 [2020-10-28 13:36:38,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:36:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-28 13:36:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-28 13:36:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-28 13:36:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-28 13:36:38,528 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 58 [2020-10-28 13:36:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:36:38,529 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-28 13:36:38,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:36:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-28 13:36:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 13:36:38,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:36:38,537 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, 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] [2020-10-28 13:36:38,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:36:38,538 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:36:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:36:38,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1532341718, now seen corresponding path program 1 times [2020-10-28 13:36:38,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:36:38,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125799604] [2020-10-28 13:36:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:36:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:36:38,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:39,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:40,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:36:40,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 13:36:40,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:36:40,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-28 13:36:40,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:36:40,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:36:40,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:36:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:36:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:36:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:36:40,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:36:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:36:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:40,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:36:40,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:36:40,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:36:40,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 13:36:40,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:36:40,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:36:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:36:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:36:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:36:40,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-28 13:36:40,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:36:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:36:40,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:40,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:36:40,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:36:40,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:36:40,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-28 13:36:40,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:36:40,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:36:40,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:36:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:36:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:36:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:36:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:36:40,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125799604] [2020-10-28 13:36:40,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:36:40,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:36:40,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545083080] [2020-10-28 13:36:40,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:36:40,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:36:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:36:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:36:40,709 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-28 13:37:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:37:00,914 INFO L93 Difference]: Finished difference Result 2469 states and 3921 transitions. [2020-10-28 13:37:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:37:00,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 129 [2020-10-28 13:37:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:37:00,932 INFO L225 Difference]: With dead ends: 2469 [2020-10-28 13:37:00,932 INFO L226 Difference]: Without dead ends: 1483 [2020-10-28 13:37:00,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:37:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-10-28 13:37:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1450. [2020-10-28 13:37:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1450 states. [2020-10-28 13:37:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 1972 transitions. [2020-10-28 13:37:01,044 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 1972 transitions. Word has length 129 [2020-10-28 13:37:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:37:01,048 INFO L481 AbstractCegarLoop]: Abstraction has 1450 states and 1972 transitions. [2020-10-28 13:37:01,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:37:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 1972 transitions. [2020-10-28 13:37:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 13:37:01,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:37:01,054 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, 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] [2020-10-28 13:37:01,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:37:01,054 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:37:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:37:01,055 INFO L82 PathProgramCache]: Analyzing trace with hash -223611657, now seen corresponding path program 1 times [2020-10-28 13:37:01,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:37:01,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120667447] [2020-10-28 13:37:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:37:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:01,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:02,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:02,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 13:37:02,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:37:02,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-28 13:37:02,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:02,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:37:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-28 13:37:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 13:37:02,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:37:02,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:37:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:02,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:02,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:37:02,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:02,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 13:37:02,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:02,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:37:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:37:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:37:02,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:37:02,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:37:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:02,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:02,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:02,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:37:02,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:02,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 13:37:02,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:02,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:02,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:37:02,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:37:02,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 13:37:02,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:37:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:37:02,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120667447] [2020-10-28 13:37:02,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:37:02,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:37:02,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130572199] [2020-10-28 13:37:02,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:37:02,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:37:02,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:37:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:37:02,904 INFO L87 Difference]: Start difference. First operand 1450 states and 1972 transitions. Second operand 5 states. [2020-10-28 13:37:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:37:22,512 INFO L93 Difference]: Finished difference Result 3374 states and 4875 transitions. [2020-10-28 13:37:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:37:22,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-28 13:37:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:37:22,531 INFO L225 Difference]: With dead ends: 3374 [2020-10-28 13:37:22,531 INFO L226 Difference]: Without dead ends: 2363 [2020-10-28 13:37:22,536 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 13:37:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-28 13:37:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2353. [2020-10-28 13:37:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2353 states. [2020-10-28 13:37:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 3070 transitions. [2020-10-28 13:37:22,634 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 3070 transitions. Word has length 132 [2020-10-28 13:37:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:37:22,635 INFO L481 AbstractCegarLoop]: Abstraction has 2353 states and 3070 transitions. [2020-10-28 13:37:22,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:37:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 3070 transitions. [2020-10-28 13:37:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 13:37:22,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:37:22,650 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:37:22,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:37:22,650 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:37:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:37:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1189127913, now seen corresponding path program 1 times [2020-10-28 13:37:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:37:22,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034336930] [2020-10-28 13:37:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:37:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:22,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:22,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:25,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:25,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 13:37:25,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:37:25,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2788 [2020-10-28 13:37:25,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:25,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:37:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:37:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 13:37:25,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:37:25,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:37:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:25,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:25,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:25,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:37:25,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 13:37:25,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:25,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:37:25,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:37:25,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:37:25,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:37:25,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:37:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:26,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:26,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 13:37:26,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:26,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-28 13:37:26,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:26,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:26,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:37:26,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:37:26,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 13:37:26,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:37:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:37:26,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034336930] [2020-10-28 13:37:26,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:37:26,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:37:26,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203466044] [2020-10-28 13:37:26,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:37:26,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:37:26,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:37:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:37:26,380 INFO L87 Difference]: Start difference. First operand 2353 states and 3070 transitions. Second operand 7 states. [2020-10-28 13:37:26,540 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 13:37:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:37:43,241 INFO L93 Difference]: Finished difference Result 4361 states and 5822 transitions. [2020-10-28 13:37:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:37:43,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 167 [2020-10-28 13:37:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:37:43,256 INFO L225 Difference]: With dead ends: 4361 [2020-10-28 13:37:43,256 INFO L226 Difference]: Without dead ends: 2447 [2020-10-28 13:37:43,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 13:37:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2020-10-28 13:37:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2379. [2020-10-28 13:37:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2020-10-28 13:37:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3096 transitions. [2020-10-28 13:37:43,341 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3096 transitions. Word has length 167 [2020-10-28 13:37:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:37:43,342 INFO L481 AbstractCegarLoop]: Abstraction has 2379 states and 3096 transitions. [2020-10-28 13:37:43,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:37:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3096 transitions. [2020-10-28 13:37:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 13:37:43,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:37:43,346 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:37:43,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:37:43,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:37:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:37:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1724187467, now seen corresponding path program 1 times [2020-10-28 13:37:43,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:37:43,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251812056] [2020-10-28 13:37:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:37:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:43,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:44,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:44,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-28 13:37:44,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:37:44,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-10-28 13:37:44,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:44,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:44,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:37:44,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:37:44,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 13:37:44,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:37:44,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:37:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:44,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:44,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:44,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:37:44,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:44,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 13:37:44,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:44,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:44,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:37:44,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:37:44,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:37:44,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:37:44,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:37:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:44,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:45,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:45,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 13:37:45,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:45,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-28 13:37:45,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:45,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:37:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:37:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 13:37:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:37:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:37:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251812056] [2020-10-28 13:37:45,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:37:45,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:37:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302352547] [2020-10-28 13:37:45,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:37:45,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:37:45,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:37:45,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:37:45,348 INFO L87 Difference]: Start difference. First operand 2379 states and 3096 transitions. Second operand 7 states. [2020-10-28 13:37:45,490 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 13:37:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:37:59,418 INFO L93 Difference]: Finished difference Result 6298 states and 8538 transitions. [2020-10-28 13:37:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:37:59,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-10-28 13:37:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:37:59,437 INFO L225 Difference]: With dead ends: 6298 [2020-10-28 13:37:59,438 INFO L226 Difference]: Without dead ends: 3434 [2020-10-28 13:37:59,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:37:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2020-10-28 13:37:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2875. [2020-10-28 13:37:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2020-10-28 13:37:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 3451 transitions. [2020-10-28 13:37:59,550 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 3451 transitions. Word has length 173 [2020-10-28 13:37:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:37:59,551 INFO L481 AbstractCegarLoop]: Abstraction has 2875 states and 3451 transitions. [2020-10-28 13:37:59,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:37:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 3451 transitions. [2020-10-28 13:37:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-28 13:37:59,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:37:59,555 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, 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, 1, 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 13:37:59,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:37:59,556 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:37:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:37:59,556 INFO L82 PathProgramCache]: Analyzing trace with hash 714498854, now seen corresponding path program 1 times [2020-10-28 13:37:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:37:59,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135327158] [2020-10-28 13:37:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:37:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:59,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:00,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:00,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 13:38:00,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:38:00,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-28 13:38:00,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:00,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:38:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:38:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:38:00,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:38:00,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:38:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:00,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:00,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:38:00,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:00,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:38:00,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:00,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:00,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:38:00,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:00,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:38:00,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:38:00,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:38:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:00,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:00,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:00,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:38:00,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:00,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 13:38:00,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:00,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:00,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:38:00,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:00,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:38:00,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:00,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:38:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:01,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:01,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 13:38:01,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:01,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 13:38:01,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:01,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:01,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:38:01,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:38:01,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 13:38:01,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:38:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:38:01,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135327158] [2020-10-28 13:38:01,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:38:01,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:38:01,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708312348] [2020-10-28 13:38:01,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:38:01,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:38:01,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:38:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:38:01,207 INFO L87 Difference]: Start difference. First operand 2875 states and 3451 transitions. Second operand 8 states. [2020-10-28 13:38:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:38:21,040 INFO L93 Difference]: Finished difference Result 8024 states and 9894 transitions. [2020-10-28 13:38:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:38:21,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 218 [2020-10-28 13:38:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:38:21,065 INFO L225 Difference]: With dead ends: 8024 [2020-10-28 13:38:21,065 INFO L226 Difference]: Without dead ends: 5155 [2020-10-28 13:38:21,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:38:21,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5155 states. [2020-10-28 13:38:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5155 to 4697. [2020-10-28 13:38:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2020-10-28 13:38:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 5656 transitions. [2020-10-28 13:38:21,209 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 5656 transitions. Word has length 218 [2020-10-28 13:38:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:38:21,210 INFO L481 AbstractCegarLoop]: Abstraction has 4697 states and 5656 transitions. [2020-10-28 13:38:21,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:38:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 5656 transitions. [2020-10-28 13:38:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 13:38:21,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:38:21,215 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, 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, 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 13:38:21,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:38:21,215 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:38:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:38:21,216 INFO L82 PathProgramCache]: Analyzing trace with hash 929987778, now seen corresponding path program 1 times [2020-10-28 13:38:21,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:38:21,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652162074] [2020-10-28 13:38:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:38:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:21,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:21,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:22,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:26,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:26,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 13:38:26,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:38:26,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 13:38:26,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:26,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:38:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-28 13:38:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 13:38:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:26,469 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:38:26,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:38:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:26,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:26,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:26,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:38:26,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:26,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:38:26,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:26,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:38:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:38:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:26,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:38:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:26,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:26,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:38:26,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:26,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 13:38:26,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:26,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:26,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:38:26,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:26,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:38:26,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:26,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:38:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:26,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:26,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:26,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:38:26,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:26,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 13:38:26,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:26,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:26,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:38:26,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:26,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:38:26,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 13:38:26,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652162074] [2020-10-28 13:38:26,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:38:26,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:38:26,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12054389] [2020-10-28 13:38:26,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:38:26,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:38:26,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:38:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:38:26,852 INFO L87 Difference]: Start difference. First operand 4697 states and 5656 transitions. Second operand 5 states. [2020-10-28 13:38:40,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:38:40,297 INFO L93 Difference]: Finished difference Result 12018 states and 14836 transitions. [2020-10-28 13:38:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:38:40,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-28 13:38:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:38:40,335 INFO L225 Difference]: With dead ends: 12018 [2020-10-28 13:38:40,335 INFO L226 Difference]: Without dead ends: 7326 [2020-10-28 13:38:40,348 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 13:38:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2020-10-28 13:38:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 6431. [2020-10-28 13:38:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6431 states. [2020-10-28 13:38:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 7668 transitions. [2020-10-28 13:38:40,551 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 7668 transitions. Word has length 220 [2020-10-28 13:38:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:38:40,551 INFO L481 AbstractCegarLoop]: Abstraction has 6431 states and 7668 transitions. [2020-10-28 13:38:40,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:38:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 7668 transitions. [2020-10-28 13:38:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-28 13:38:40,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:38:40,556 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:38:40,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:38:40,557 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:38:40,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:38:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1116448120, now seen corresponding path program 1 times [2020-10-28 13:38:40,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:38:40,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934624465] [2020-10-28 13:38:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:38:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:40,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:41,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:45,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:45,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-28 13:38:45,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:38:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 13:38:45,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:45,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:38:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:38:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 13:38:45,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:45,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:38:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:45,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:45,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:45,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:38:45,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:45,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:38:45,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:45,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:38:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:38:45,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:45,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:38:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:45,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:46,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:46,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:38:46,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:46,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 13:38:46,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:46,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:46,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:38:46,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:46,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:38:46,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:46,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:38:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:46,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:46,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:46,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:46,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:38:46,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:38:46,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-28 13:38:46,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:46,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:46,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:38:46,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:46,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:38:46,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 13:38:46,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934624465] [2020-10-28 13:38:46,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:38:46,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:38:46,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217173691] [2020-10-28 13:38:46,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:38:46,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:38:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:38:46,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:38:46,514 INFO L87 Difference]: Start difference. First operand 6431 states and 7668 transitions. Second operand 6 states. [2020-10-28 13:39:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:39:01,909 INFO L93 Difference]: Finished difference Result 12874 states and 15367 transitions. [2020-10-28 13:39:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:39:01,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 231 [2020-10-28 13:39:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:39:01,942 INFO L225 Difference]: With dead ends: 12874 [2020-10-28 13:39:01,942 INFO L226 Difference]: Without dead ends: 6449 [2020-10-28 13:39:01,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:39:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2020-10-28 13:39:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6431. [2020-10-28 13:39:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6431 states. [2020-10-28 13:39:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 7618 transitions. [2020-10-28 13:39:02,144 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 7618 transitions. Word has length 231 [2020-10-28 13:39:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:39:02,145 INFO L481 AbstractCegarLoop]: Abstraction has 6431 states and 7618 transitions. [2020-10-28 13:39:02,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:39:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 7618 transitions. [2020-10-28 13:39:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-28 13:39:02,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:39:02,152 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:39:02,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:39:02,153 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:39:02,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:39:02,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1882221623, now seen corresponding path program 1 times [2020-10-28 13:39:02,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:39:02,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213333170] [2020-10-28 13:39:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:39:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:02,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:06,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:06,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 300 [2020-10-28 13:39:06,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:39:06,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4212 [2020-10-28 13:39:06,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:06,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:39:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 240 [2020-10-28 13:39:06,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 13:39:06,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:06,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:39:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:06,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:06,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:06,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:39:06,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:39:06,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:06,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:06,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:06,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:06,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:06,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:06,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:39:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:06,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:06,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:06,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:39:06,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:06,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 13:39:06,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:06,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:06,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:06,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:06,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:06,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:39:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:06,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:06,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:06,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 13:39:06,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 13:39:06,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:06,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:06,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 13:39:06,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-28 13:39:07,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213333170] [2020-10-28 13:39:07,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:39:07,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:39:07,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918937266] [2020-10-28 13:39:07,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:39:07,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:39:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:39:07,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:39:07,137 INFO L87 Difference]: Start difference. First operand 6431 states and 7618 transitions. Second operand 5 states. [2020-10-28 13:39:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:39:25,516 INFO L93 Difference]: Finished difference Result 13778 states and 16394 transitions. [2020-10-28 13:39:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:39:25,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 286 [2020-10-28 13:39:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:39:25,549 INFO L225 Difference]: With dead ends: 13778 [2020-10-28 13:39:25,549 INFO L226 Difference]: Without dead ends: 7353 [2020-10-28 13:39:25,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 13:39:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7353 states. [2020-10-28 13:39:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7353 to 6895. [2020-10-28 13:39:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6895 states. [2020-10-28 13:39:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 8184 transitions. [2020-10-28 13:39:25,734 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 8184 transitions. Word has length 286 [2020-10-28 13:39:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:39:25,735 INFO L481 AbstractCegarLoop]: Abstraction has 6895 states and 8184 transitions. [2020-10-28 13:39:25,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:39:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 8184 transitions. [2020-10-28 13:39:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-28 13:39:25,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:39:25,743 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, 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, 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 13:39:25,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:39:25,744 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:39:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:39:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1698697252, now seen corresponding path program 1 times [2020-10-28 13:39:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:39:25,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297789313] [2020-10-28 13:39:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:39:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:25,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:26,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:30,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:30,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-28 13:39:30,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:39:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4388 [2020-10-28 13:39:30,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:30,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:39:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 13:39:30,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 13:39:30,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:30,472 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:39:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:39:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:30,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:30,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:39:30,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:30,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:39:30,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:30,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:30,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:39:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:30,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:30,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:30,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:39:30,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:30,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 13:39:30,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:30,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:30,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:30,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:30,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:30,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:39:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:30,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:30,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:39:30,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:30,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 13:39:30,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:30,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:30,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:39:30,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:30,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:39:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:30,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:30,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:30,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:39:30,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:39:30,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 13:39:30,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:30,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:30,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:30,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:30,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 13:39:30,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 156 proven. 3 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-10-28 13:39:31,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297789313] [2020-10-28 13:39:31,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:39:31,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:39:31,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257914056] [2020-10-28 13:39:31,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:39:31,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:39:31,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:39:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:39:31,088 INFO L87 Difference]: Start difference. First operand 6895 states and 8184 transitions. Second operand 5 states. [2020-10-28 13:39:34,619 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:39:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:39:46,655 INFO L93 Difference]: Finished difference Result 16919 states and 20482 transitions. [2020-10-28 13:39:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:39:46,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2020-10-28 13:39:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:39:46,691 INFO L225 Difference]: With dead ends: 16919 [2020-10-28 13:39:46,691 INFO L226 Difference]: Without dead ends: 9138 [2020-10-28 13:39:46,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:39:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9138 states. [2020-10-28 13:39:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9138 to 9125. [2020-10-28 13:39:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9125 states. [2020-10-28 13:39:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9125 states to 9125 states and 10672 transitions. [2020-10-28 13:39:46,912 INFO L78 Accepts]: Start accepts. Automaton has 9125 states and 10672 transitions. Word has length 302 [2020-10-28 13:39:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:39:46,913 INFO L481 AbstractCegarLoop]: Abstraction has 9125 states and 10672 transitions. [2020-10-28 13:39:46,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:39:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 9125 states and 10672 transitions. [2020-10-28 13:39:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-28 13:39:46,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:39:46,921 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, 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, 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 13:39:46,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:39:46,921 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:39:46,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:39:46,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1550235440, now seen corresponding path program 1 times [2020-10-28 13:39:46,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:39:46,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273636284] [2020-10-28 13:39:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:39:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:47,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:47,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking...