/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/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:56:27,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:56:27,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:56:27,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:56:27,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:56:27,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:56:27,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:56:27,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:56:27,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:56:27,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:56:27,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:56:27,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:56:27,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:56:27,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:56:27,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:56:27,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:56:27,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:56:27,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:56:27,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:56:27,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:56:27,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:56:27,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:56:27,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:56:27,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:56:27,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:56:27,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:56:27,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:56:27,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:56:27,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:56:27,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:56:27,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:56:27,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:56:27,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:56:27,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:56:27,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:56:27,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:56:27,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:56:27,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:56:27,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:56:27,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:56:27,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:56:27,314 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 14:56:27,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:56:27,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:56:27,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:56:27,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:56:27,342 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:56:27,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:56:27,342 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:56:27,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:56:27,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:56:27,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:56:27,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:56:27,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:56:27,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:56:27,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:56:27,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:56:27,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:56:27,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:56:27,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:56:27,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:56:27,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:56:27,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:56:27,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:56:27,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:56:27,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:56:27,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:56:27,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:56:27,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:56:27,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:56:27,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:56:27,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:56:27,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:56:27,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:56:27,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:56:27,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:56:27,804 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:56:27,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-28 14:56:27,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a62c15ff9/28612ee685e4445a8592b7afc3dfb777/FLAG763f935e9 [2020-10-28 14:56:28,513 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:56:28,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-28 14:56:28,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a62c15ff9/28612ee685e4445a8592b7afc3dfb777/FLAG763f935e9 [2020-10-28 14:56:28,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a62c15ff9/28612ee685e4445a8592b7afc3dfb777 [2020-10-28 14:56:28,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:56:28,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:56:28,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:56:28,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:56:28,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:56:28,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:56:28" (1/1) ... [2020-10-28 14:56:28,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132a9d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:28, skipping insertion in model container [2020-10-28 14:56:28,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:56:28" (1/1) ... [2020-10-28 14:56:28,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:56:28,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:56:29,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:56:29,117 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:56:29,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:56:29,147 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:56:29,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29 WrapperNode [2020-10-28 14:56:29,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:56:29,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:56:29,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:56:29,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:56:29,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (1/1) ... [2020-10-28 14:56:29,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (1/1) ... [2020-10-28 14:56:29,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (1/1) ... [2020-10-28 14:56:29,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (1/1) ... [2020-10-28 14:56:29,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (1/1) ... [2020-10-28 14:56:29,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (1/1) ... [2020-10-28 14:56:29,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (1/1) ... [2020-10-28 14:56:29,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:56:29,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:56:29,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:56:29,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:56:29,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (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 14:56:29,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:56:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:56:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:56:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:56:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:56:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:56:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:56:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:56:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:56:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:56:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:56:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:56:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:56:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:56:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:56:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:56:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:56:29,707 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:56:29,708 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:56:29,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:56:29 BoogieIcfgContainer [2020-10-28 14:56:29,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:56:29,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:56:29,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:56:29,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:56:29,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:56:28" (1/3) ... [2020-10-28 14:56:29,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268c01c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:56:29, skipping insertion in model container [2020-10-28 14:56:29,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:29" (2/3) ... [2020-10-28 14:56:29,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268c01c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:56:29, skipping insertion in model container [2020-10-28 14:56:29,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:56:29" (3/3) ... [2020-10-28 14:56:29,719 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-10-28 14:56:29,734 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:56:29,739 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:56:29,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:56:29,800 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:56:29,800 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:56:29,800 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:56:29,800 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:56:29,801 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:56:29,801 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:56:29,801 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:56:29,801 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:56:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 14:56:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:56:29,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:29,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:29,828 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:29,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2005875033, now seen corresponding path program 1 times [2020-10-28 14:56:29,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:29,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415935931] [2020-10-28 14:56:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:30,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:56:30,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:30,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 14:56:30,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:56:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:30,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:56:30,239 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-28 14:56:30,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:30,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:30,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:30,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 14:56:30,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:30,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:30,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:30,335 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 14:56:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415935931] [2020-10-28 14:56:30,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:30,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:56:30,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920996040] [2020-10-28 14:56:30,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:56:30,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:56:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:56:30,373 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-28 14:56:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:30,448 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-28 14:56:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:56:30,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:56:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:30,458 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:56:30,458 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:56:30,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:56:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:56:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:56:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:56:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 14:56:30,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-28 14:56:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:30,505 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 14:56:30,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:56:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 14:56:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:56:30,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:30,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:30,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:56:30,507 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1519179466, now seen corresponding path program 1 times [2020-10-28 14:56:30,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:30,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118178719] [2020-10-28 14:56:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:30,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:56:30,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:30,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-28 14:56:30,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:56:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:56:30,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:30,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:30,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:30,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:56:30,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:30,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:30,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:30,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:30,771 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 14:56:30,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118178719] [2020-10-28 14:56:30,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:30,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:56:30,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772862671] [2020-10-28 14:56:30,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:56:30,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:30,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:56:30,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:56:30,775 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 14:56:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:30,925 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 14:56:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:56:30,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:56:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:30,926 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:56:30,926 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:56:30,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:56:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-28 14:56:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:56:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 14:56:30,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 14:56:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:30,937 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 14:56:30,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:56:30,937 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 14:56:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:56:30,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:30,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:30,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:56:30,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:30,939 INFO L82 PathProgramCache]: Analyzing trace with hash 956003377, now seen corresponding path program 1 times [2020-10-28 14:56:30,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:30,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755252429] [2020-10-28 14:56:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:31,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:56:31,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:56:31,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-28 14:56:31,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:31,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:56:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:56:31,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:56:31,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:31,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:31,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:31,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:56:31,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:31,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:31,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:31,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755252429] [2020-10-28 14:56:31,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:31,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:56:31,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529342762] [2020-10-28 14:56:31,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:56:31,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:56:31,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:31,795 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-28 14:56:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:31,949 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-28 14:56:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:56:31,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 14:56:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:31,951 INFO L225 Difference]: With dead ends: 27 [2020-10-28 14:56:31,951 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:56:31,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:56:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 14:56:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:56:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 14:56:31,960 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 14:56:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:31,961 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 14:56:31,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:56:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 14:56:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:56:31,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:31,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:31,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:56:31,962 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -480605846, now seen corresponding path program 2 times [2020-10-28 14:56:31,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:31,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532801044] [2020-10-28 14:56:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:31,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:32,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:56:32,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:56:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-28 14:56:32,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:32,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:56:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:56:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:56:32,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:32,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:32,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:32,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:32,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:32,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:32,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:56:32,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532801044] [2020-10-28 14:56:32,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:32,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:56:32,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873533643] [2020-10-28 14:56:32,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:56:32,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:32,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:56:32,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:56:32,882 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-28 14:56:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:32,963 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-10-28 14:56:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:56:32,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:56:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:32,964 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:56:32,964 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:56:32,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:56:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:56:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:56:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 14:56:32,973 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-28 14:56:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:32,973 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 14:56:32,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:56:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 14:56:32,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:56:32,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:32,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:32,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:56:32,975 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:32,975 INFO L82 PathProgramCache]: Analyzing trace with hash -485019992, now seen corresponding path program 1 times [2020-10-28 14:56:32,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:32,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346706125] [2020-10-28 14:56:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:34,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:56:34,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:56:34,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1445 [2020-10-28 14:56:34,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:34,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:56:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:56:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:34,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:34,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:34,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:34,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:34,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:56:34,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:34,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:34,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:34,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:34,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:34,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:56:34,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346706125] [2020-10-28 14:56:34,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:34,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:56:34,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780496047] [2020-10-28 14:56:34,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:56:34,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:56:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:56:34,557 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-28 14:56:34,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:34,770 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-28 14:56:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:56:34,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:56:34,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:34,772 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:56:34,772 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:56:34,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:56:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:56:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-28 14:56:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:56:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-28 14:56:34,782 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-28 14:56:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:34,783 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-28 14:56:34,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:56:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-28 14:56:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:56:34,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:34,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:34,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:56:34,785 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2041253033, now seen corresponding path program 2 times [2020-10-28 14:56:34,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:34,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908463393] [2020-10-28 14:56:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:34,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:35,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:35,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:39,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:56:39,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:56:39,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:56:39,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:39,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:39,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:56:39,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:56:39,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:56:39,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:39,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:39,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:39,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:39,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:39,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:56:39,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:39,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:39,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:39,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:39,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:39,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:56:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:56:39,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908463393] [2020-10-28 14:56:39,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:39,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:56:39,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615200121] [2020-10-28 14:56:39,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:56:39,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:39,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:56:39,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:39,930 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-28 14:56:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:40,075 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-28 14:56:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:56:40,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 14:56:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:40,077 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:56:40,077 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:56:40,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:56:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:56:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:56:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-28 14:56:40,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-10-28 14:56:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:40,098 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-28 14:56:40,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:56:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-28 14:56:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:56:40,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:40,100 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:40,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:56:40,100 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:40,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1932759249, now seen corresponding path program 3 times [2020-10-28 14:56:40,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:40,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344564009] [2020-10-28 14:56:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:40,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:40,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:40,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:41,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:41,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:45,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:45,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:56:45,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:56:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:56:45,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:45,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:56:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:56:45,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:45,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:45,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:45,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:45,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:45,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:45,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:45,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:56:45,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344564009] [2020-10-28 14:56:45,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:45,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:56:45,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552409744] [2020-10-28 14:56:45,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:56:45,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:56:45,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:45,276 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-28 14:56:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:45,532 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-28 14:56:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:56:45,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 14:56:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:45,533 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:56:45,533 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:56:45,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:56:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:56:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-28 14:56:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:56:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-28 14:56:45,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2020-10-28 14:56:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:45,546 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-28 14:56:45,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:56:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-28 14:56:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:56:45,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:45,547 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:45,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:56:45,547 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2092150666, now seen corresponding path program 4 times [2020-10-28 14:56:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:45,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691643444] [2020-10-28 14:56:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:45,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:45,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:45,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:50,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:56:50,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:56:50,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:56:50,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:50,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:56:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:56:50,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:50,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:50,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:50,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:50,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:50,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:50,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:50,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:56:50,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691643444] [2020-10-28 14:56:50,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:50,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:56:50,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921977478] [2020-10-28 14:56:50,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:56:50,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:50,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:56:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:56:50,734 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-10-28 14:56:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:51,070 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 14:56:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:56:51,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-28 14:56:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:51,071 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:56:51,071 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:56:51,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:56:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:56:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-28 14:56:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:56:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 14:56:51,090 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-10-28 14:56:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:51,092 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 14:56:51,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:56:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 14:56:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:56:51,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:51,098 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:51,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:56:51,099 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash -800662415, now seen corresponding path program 5 times [2020-10-28 14:56:51,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:51,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627454590] [2020-10-28 14:56:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:51,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:51,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:51,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:51,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:51,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:51,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:56,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:56:56,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:56:56,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:56:56,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:56,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:56:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:56:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:56:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:56,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:56,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:56,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:56,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:56,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 14:56:56,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627454590] [2020-10-28 14:56:56,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:56,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:56:56,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878920261] [2020-10-28 14:56:56,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:56:56,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:56:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:56:56,229 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-28 14:56:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:56,394 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-10-28 14:56:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:56:56,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-28 14:56:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:56,396 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:56:56,396 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:56:56,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:56:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:56:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:56:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:56:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-28 14:56:56,413 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 37 [2020-10-28 14:56:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:56,413 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-28 14:56:56,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:56:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-28 14:56:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:56:56,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:56,415 INFO L422 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:56,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:56:56,415 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1137089611, now seen corresponding path program 6 times [2020-10-28 14:56:56,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:56,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705958510] [2020-10-28 14:56:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:56,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:01,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:57:01,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:01,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:01,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:01,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:01,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:01,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:01,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:01,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:01,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:01,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:01,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:01,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 14:57:01,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705958510] [2020-10-28 14:57:01,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:01,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:01,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286951997] [2020-10-28 14:57:01,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:01,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:01,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:01,617 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2020-10-28 14:57:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:02,153 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-28 14:57:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:02,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-28 14:57:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:02,155 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:57:02,155 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:57:02,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:57:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-28 14:57:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:57:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-28 14:57:02,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 42 [2020-10-28 14:57:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:02,186 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-28 14:57:02,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-28 14:57:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:57:02,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:02,195 INFO L422 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:57:02,196 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1523712548, now seen corresponding path program 7 times [2020-10-28 14:57:02,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:02,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656536566] [2020-10-28 14:57:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:02,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:02,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:02,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:02,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:02,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:03,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:07,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:57:07,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:57:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:57:07,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:07,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:57:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:57:07,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:57:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:07,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:07,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:07,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:07,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:07,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:07,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:07,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 159 proven. 6 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 14:57:07,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656536566] [2020-10-28 14:57:07,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:07,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:57:07,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071720727] [2020-10-28 14:57:07,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:57:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:57:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:57:07,344 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 7 states. [2020-10-28 14:57:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:07,632 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-28 14:57:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:57:07,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-28 14:57:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:07,633 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:57:07,634 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:57:07,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:57:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 14:57:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:57:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-28 14:57:07,656 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 48 [2020-10-28 14:57:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:07,656 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-28 14:57:07,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:57:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-28 14:57:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:57:07,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:07,657 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:07,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:57:07,658 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:07,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1665681110, now seen corresponding path program 8 times [2020-10-28 14:57:07,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:07,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417610648] [2020-10-28 14:57:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:07,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:07,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:09,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:12,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:57:12,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:57:12,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:57:12,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:12,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:12,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:57:12,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:12,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:57:12,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:12,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:12,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:12,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:12,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:12,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:12,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:12,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:12,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 131 proven. 10 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 14:57:12,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417610648] [2020-10-28 14:57:12,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:12,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:57:12,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140329816] [2020-10-28 14:57:12,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:57:12,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:57:12,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:57:12,826 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 8 states. [2020-10-28 14:57:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:13,125 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-10-28 14:57:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:57:13,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-28 14:57:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:13,126 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:57:13,126 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:57:13,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:57:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 14:57:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:57:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-28 14:57:13,164 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 54 [2020-10-28 14:57:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:13,165 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-28 14:57:13,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:57:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-28 14:57:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:57:13,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:13,169 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:13,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:57:13,170 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:13,172 INFO L82 PathProgramCache]: Analyzing trace with hash -832639004, now seen corresponding path program 9 times [2020-10-28 14:57:13,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:13,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658617095] [2020-10-28 14:57:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:13,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:13,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:13,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:13,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:18,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:57:18,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:18,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:57:18,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:18,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 14:57:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:57:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:18,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:18,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:18,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:18,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:18,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:18,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:18,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:18,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 417 proven. 15 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-28 14:57:18,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658617095] [2020-10-28 14:57:18,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:18,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498656458] [2020-10-28 14:57:18,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:18,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:18,374 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 9 states. [2020-10-28 14:57:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:18,745 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-28 14:57:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:18,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-28 14:57:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:18,747 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:57:18,747 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:57:18,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:57:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 14:57:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:57:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-28 14:57:18,768 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 60 [2020-10-28 14:57:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:18,768 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-28 14:57:18,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-28 14:57:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:57:18,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:18,769 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:18,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:57:18,769 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -140658070, now seen corresponding path program 10 times [2020-10-28 14:57:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:18,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799742771] [2020-10-28 14:57:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:18,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:23,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:57:23,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:23,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:23,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:23,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 14:57:23,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799742771] [2020-10-28 14:57:23,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:23,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:57:23,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221132603] [2020-10-28 14:57:23,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:57:23,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:23,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:57:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:57:23,962 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 10 states. [2020-10-28 14:57:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:24,327 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2020-10-28 14:57:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:57:24,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-28 14:57:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:24,329 INFO L225 Difference]: With dead ends: 126 [2020-10-28 14:57:24,329 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:57:24,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:57:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:57:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 14:57:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:57:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-28 14:57:24,365 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 66 [2020-10-28 14:57:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:24,366 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-28 14:57:24,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:57:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-28 14:57:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:57:24,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:24,367 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:24,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:57:24,367 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:24,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1255641692, now seen corresponding path program 11 times [2020-10-28 14:57:24,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:24,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010199166] [2020-10-28 14:57:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:24,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:24,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:24,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:24,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:29,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:57:29,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:29,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:57:29,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:29,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:57:29,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 14:57:29,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:57:29,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:29,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:29,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:29,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:29,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:29,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:29,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:29,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:29,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:29,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:29,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:29,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 594 proven. 28 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2020-10-28 14:57:29,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010199166] [2020-10-28 14:57:29,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:29,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:57:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035452476] [2020-10-28 14:57:29,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:57:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:57:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:29,611 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 11 states. [2020-10-28 14:57:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:30,083 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2020-10-28 14:57:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:57:30,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-28 14:57:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:30,085 INFO L225 Difference]: With dead ends: 137 [2020-10-28 14:57:30,085 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:57:30,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:57:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:57:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 14:57:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:57:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-28 14:57:30,109 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 72 [2020-10-28 14:57:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:30,109 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-28 14:57:30,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:57:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-28 14:57:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 14:57:30,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:30,110 INFO L422 BasicCegarLoop]: trace histogram [48, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:30,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:57:30,111 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:30,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2014532694, now seen corresponding path program 12 times [2020-10-28 14:57:30,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:30,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392945724] [2020-10-28 14:57:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:30,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:30,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:30,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:30,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:35,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:35,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 14:57:35,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:35,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 14:57:35,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:35,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:57:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:57:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:57:35,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:35,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:35,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:35,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:35,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:35,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:35,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:35,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 744 proven. 36 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-10-28 14:57:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392945724] [2020-10-28 14:57:35,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:35,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:57:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967773821] [2020-10-28 14:57:35,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:57:35,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:57:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:57:35,407 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 12 states. [2020-10-28 14:57:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:36,059 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2020-10-28 14:57:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:57:36,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-28 14:57:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:36,061 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:57:36,061 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:57:36,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:57:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:57:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-28 14:57:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:57:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-28 14:57:36,096 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 78 [2020-10-28 14:57:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:36,096 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-28 14:57:36,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:57:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-28 14:57:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 14:57:36,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:36,104 INFO L422 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:36,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:57:36,105 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:36,106 INFO L82 PathProgramCache]: Analyzing trace with hash 766671716, now seen corresponding path program 13 times [2020-10-28 14:57:36,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:36,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013499051] [2020-10-28 14:57:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:36,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:41,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 14:57:41,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:41,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 14:57:41,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:41,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:41,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:57:41,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:41,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:57:41,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:41,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:41,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:41,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:41,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:41,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:41,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:41,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2020-10-28 14:57:41,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013499051] [2020-10-28 14:57:41,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:41,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:57:41,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369236388] [2020-10-28 14:57:41,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:57:41,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:41,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:57:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:41,368 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 13 states. [2020-10-28 14:57:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:41,927 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2020-10-28 14:57:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:57:41,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-28 14:57:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:41,929 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:57:41,929 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:57:41,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:57:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:57:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 14:57:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:57:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-28 14:57:41,959 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 84 [2020-10-28 14:57:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:41,959 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-28 14:57:41,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:57:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-28 14:57:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 14:57:41,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:41,960 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:41,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:57:41,961 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -404714262, now seen corresponding path program 14 times [2020-10-28 14:57:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:41,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093232775] [2020-10-28 14:57:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:42,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:42,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:57:43,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:43,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 14:57:43,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:43,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:43,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:43,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 14:57:43,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093232775] [2020-10-28 14:57:43,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:43,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:57:43,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109578178] [2020-10-28 14:57:43,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:57:43,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:57:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:57:43,401 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 10 states. [2020-10-28 14:57:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:43,883 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-28 14:57:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:57:43,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-10-28 14:57:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:43,886 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:57:43,886 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 14:57:43,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:57:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 14:57:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2020-10-28 14:57:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:57:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-10-28 14:57:43,920 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 90 [2020-10-28 14:57:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:43,922 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-10-28 14:57:43,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:57:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-10-28 14:57:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 14:57:43,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:43,923 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:43,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:57:43,923 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash -216654063, now seen corresponding path program 15 times [2020-10-28 14:57:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:43,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469451574] [2020-10-28 14:57:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:44,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:44,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:46,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2069 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 14:57:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:46,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:46,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:46,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:46,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:46,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:46,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:46,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:46,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:46,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:46,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:46,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:46,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-28 14:57:46,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469451574] [2020-10-28 14:57:46,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:46,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:57:46,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650629712] [2020-10-28 14:57:46,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:57:46,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:57:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:46,255 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 11 states. [2020-10-28 14:57:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:46,864 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2020-10-28 14:57:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:57:46,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-28 14:57:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:46,866 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:57:46,866 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:57:46,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:57:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:57:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-10-28 14:57:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:57:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-10-28 14:57:46,898 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 103 [2020-10-28 14:57:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:46,898 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-10-28 14:57:46,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:57:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-10-28 14:57:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 14:57:46,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:46,899 INFO L422 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:46,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:57:46,899 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1808237642, now seen corresponding path program 16 times [2020-10-28 14:57:46,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:46,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820516021] [2020-10-28 14:57:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:46,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 14:57:48,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:48,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1939 [2020-10-28 14:57:48,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:57:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 14:57:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:57:48,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:49,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:49,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:49,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:49,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:49,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:57:49,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:49,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:49,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 862 proven. 0 refuted. 0 times theorem prover too weak. 3030 trivial. 0 not checked. [2020-10-28 14:57:49,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820516021] [2020-10-28 14:57:49,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:49,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:57:49,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642599101] [2020-10-28 14:57:49,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:57:49,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:49,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:57:49,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:57:49,082 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 8 states. [2020-10-28 14:57:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:51,528 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-10-28 14:57:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:57:51,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 116 [2020-10-28 14:57:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:51,529 INFO L225 Difference]: With dead ends: 117 [2020-10-28 14:57:51,529 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:57:51,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:57:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:57:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:57:51,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:57:51,530 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2020-10-28 14:57:51,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:51,530 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:57:51,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:57:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:57:51,531 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:57:51,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:57:51,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:57:52,175 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 39 [2020-10-28 14:57:52,376 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 14:57:52,376 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 14:57:52,376 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 14:57:52,376 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 14:57:52,377 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:57:52,377 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:57:52,377 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L270 CegarLoopResult]: At program point L19-2(lines 19 21) the Hoare annotation is: (<= main_~x~0 (+ (* 4294967296 (div main_~x~0 4294967296)) 268435454)) [2020-10-28 14:57:52,377 INFO L274 CegarLoopResult]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2020-10-28 14:57:52,377 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2020-10-28 14:57:52,377 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 24) the Hoare annotation is: (let ((.cse0 (div main_~x~0 2))) (or (not (= main_~x~0 (* .cse0 2))) (<= .cse0 (+ (* 2147483648 (div main_~x~0 4294967296)) 134217727)))) [2020-10-28 14:57:52,378 INFO L270 CegarLoopResult]: At program point L16-3(lines 16 24) the Hoare annotation is: (not (= main_~x~0 (* (div main_~x~0 2) 2))) [2020-10-28 14:57:52,378 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-28 14:57:52,378 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-28 14:57:52,378 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 14:57:52,378 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-28 14:57:52,378 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-28 14:57:52,378 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-28 14:57:52,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:57:52 BoogieIcfgContainer [2020-10-28 14:57:52,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:57:52,399 INFO L168 Benchmark]: Toolchain (without parser) took 83505.84 ms. Allocated memory was 151.0 MB in the beginning and 784.3 MB in the end (delta: 633.3 MB). Free memory was 127.0 MB in the beginning and 753.5 MB in the end (delta: -626.6 MB). Peak memory consumption was 469.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:52,400 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.3 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:57:52,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.00 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:52,401 INFO L168 Benchmark]: Boogie Preprocessor took 37.41 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:57:52,402 INFO L168 Benchmark]: RCFGBuilder took 522.55 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 103.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:52,402 INFO L168 Benchmark]: TraceAbstraction took 82685.64 ms. Allocated memory was 151.0 MB in the beginning and 784.3 MB in the end (delta: 633.3 MB). Free memory was 102.6 MB in the beginning and 753.5 MB in the end (delta: -650.9 MB). Peak memory consumption was 445.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:52,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.3 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.00 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.41 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 522.55 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 103.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 82685.64 ms. Allocated memory was 151.0 MB in the beginning and 784.3 MB in the end (delta: 633.3 MB). Free memory was 102.6 MB in the beginning and 753.5 MB in the end (delta: -650.9 MB). Peak memory consumption was 445.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: x <= 4294967296 * (x / 4294967296) + 268435454 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: !(x == x / 2 * 2) || x / 2 <= 2147483648 * (x / 4294967296) + 134217727 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 81.7s, OverallIterations: 20, TraceHistogramMax: 80, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 314 SDtfs, 413 SDslu, 516 SDs, 0 SdLazy, 1480 SolverSat, 248 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 275 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 44 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 67 PreInvPairs, 165 NumberOfFragments, 76 HoareAnnotationTreeSize, 67 FomulaSimplifications, 399658 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 10 FomulaSimplificationsInter, 214 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 71.6s InterpolantComputationTime, 1010 NumberOfCodeBlocks, 1010 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 990 ConstructedInterpolants, 0 QuantifiedInterpolants, 251218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 11437/16343 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...