/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=SHALLOWEST --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/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:33:58,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:33:58,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:33:58,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:33:58,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:33:58,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:33:58,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:33:58,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:33:58,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:33:58,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:33:58,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:33:58,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:33:58,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:33:58,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:33:58,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:33:58,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:33:58,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:33:58,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:33:58,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:33:58,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:33:58,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:33:58,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:33:58,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:33:58,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:33:58,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:33:58,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:33:58,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:33:58,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:33:58,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:33:58,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:33:58,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:33:58,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:33:58,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:33:58,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:33:58,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:33:58,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:33:58,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:33:58,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:33:58,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:33:58,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:33:58,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:33:58,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:33:58,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:33:58,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:33:58,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:33:58,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:33:58,400 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:33:58,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:33:58,400 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:33:58,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:33:58,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:33:58,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:33:58,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:33:58,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:33:58,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:33:58,403 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:33:58,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:33:58,403 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:33:58,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:33:58,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:33:58,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:33:58,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:33:58,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:33:58,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:33:58,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:33:58,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:33:58,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:33:58,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:33:58,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:33:58,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:33:58,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:33:58,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:33:58,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:33:58,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:33:58,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:33:58,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:33:58,867 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:33:58,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-27 01:33:58,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9cbaea95/d137660e347e4e1699a575d6a6f70a5c/FLAG20e57ede2 [2020-10-27 01:33:59,506 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:33:59,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-27 01:33:59,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9cbaea95/d137660e347e4e1699a575d6a6f70a5c/FLAG20e57ede2 [2020-10-27 01:33:59,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9cbaea95/d137660e347e4e1699a575d6a6f70a5c [2020-10-27 01:33:59,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:33:59,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:33:59,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:33:59,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:33:59,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:33:59,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:33:59" (1/1) ... [2020-10-27 01:33:59,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24520470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:33:59, skipping insertion in model container [2020-10-27 01:33:59,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:33:59" (1/1) ... [2020-10-27 01:33:59,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:33:59,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:34:00,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:00,154 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:34:00,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:00,186 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:34:00,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00 WrapperNode [2020-10-27 01:34:00,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:00,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:34:00,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:34:00,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:34:00,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... [2020-10-27 01:34:00,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... [2020-10-27 01:34:00,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... [2020-10-27 01:34:00,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... [2020-10-27 01:34:00,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... [2020-10-27 01:34:00,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... [2020-10-27 01:34:00,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... [2020-10-27 01:34:00,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:34:00,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:34:00,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:34:00,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:34:00,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:00,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:34:00,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:34:00,299 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:34:00,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:34:00,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:34:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:34:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:34:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:34:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:34:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:34:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:34:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:34:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:34:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:34:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:34:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:34:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:34:00,776 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:34:00,776 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:34:00,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:00 BoogieIcfgContainer [2020-10-27 01:34:00,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:34:00,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:34:00,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:34:00,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:34:00,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:33:59" (1/3) ... [2020-10-27 01:34:00,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6389df50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:00, skipping insertion in model container [2020-10-27 01:34:00,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:00" (2/3) ... [2020-10-27 01:34:00,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6389df50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:00, skipping insertion in model container [2020-10-27 01:34:00,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:00" (3/3) ... [2020-10-27 01:34:00,790 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2020-10-27 01:34:00,803 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:34:00,808 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:34:00,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:34:00,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:34:00,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:34:00,865 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:34:00,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:34:00,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:34:00,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:34:00,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:34:00,866 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:34:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:34:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:34:00,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:00,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:00,904 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 01:34:00,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:00,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152144455] [2020-10-27 01:34:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:01,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:01,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:34:01,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 01:34:01,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:01,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:01,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:34:01,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:01,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:01,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:01,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:01,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:01,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 01:34:01,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:01,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:01,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:01,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:01,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:01,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152144455] [2020-10-27 01:34:01,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:01,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:34:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082697715] [2020-10-27 01:34:01,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:34:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:34:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:34:01,572 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 01:34:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:01,631 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 01:34:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:34:01,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:34:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:01,640 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:34:01,641 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 01:34:01,644 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 [2020-10-27 01:34:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 01:34:01,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 01:34:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 01:34:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 01:34:01,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 01:34:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:01,685 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 01:34:01,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:34:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 01:34:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:34:01,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:01,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:01,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:34:01,687 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 01:34:01,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:01,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417389298] [2020-10-27 01:34:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:01,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:01,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:01,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:34:01,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 01:34:01,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:34:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:34:01,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:01,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:01,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:01,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:01,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:34:01,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:01,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:01,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:01,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:01,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:01,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417389298] [2020-10-27 01:34:01,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:01,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:34:01,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753180039] [2020-10-27 01:34:01,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:34:01,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:34:01,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:34:01,944 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-27 01:34:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:02,018 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 01:34:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:34:02,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:34:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:02,019 INFO L225 Difference]: With dead ends: 20 [2020-10-27 01:34:02,020 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:34:02,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:34:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:34:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:34:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:34:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 01:34:02,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 01:34:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:02,030 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 01:34:02,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:34:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 01:34:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:34:02,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:02,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:02,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:34:02,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 01:34:02,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:02,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33276718] [2020-10-27 01:34:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:02,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:02,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:34:02,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:02,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 01:34:02,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:34:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:34:02,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:02,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:02,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:02,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:02,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:02,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 01:34:02,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:02,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:02,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:02,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:02,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:02,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33276718] [2020-10-27 01:34:02,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:02,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:34:02,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788803845] [2020-10-27 01:34:02,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:34:02,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:34:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:34:02,305 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-27 01:34:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:02,485 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 01:34:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:34:02,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:34:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:02,487 INFO L225 Difference]: With dead ends: 21 [2020-10-27 01:34:02,487 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:34:02,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:34:02,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:34:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:34:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:34:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:34:02,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:34:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:02,495 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:34:02,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:34:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:34:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:34:02,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:02,496 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:02,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:34:02,497 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 01:34:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:02,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959481290] [2020-10-27 01:34:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:02,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:02,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:34:02,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:02,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 01:34:02,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:02,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:34:02,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:02,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:34:02,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:02,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:02,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:02,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:02,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:02,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:34:02,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:02,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959481290] [2020-10-27 01:34:02,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:02,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:34:02,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574258998] [2020-10-27 01:34:02,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:34:02,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:02,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:34:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:02,821 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-27 01:34:02,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:02,987 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 01:34:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:34:02,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-27 01:34:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:02,988 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:34:02,988 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:34:02,989 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 [2020-10-27 01:34:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:34:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:34:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:34:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:34:02,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 01:34:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:02,995 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:34:02,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:34:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:34:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:34:02,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:02,996 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:02,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:34:02,997 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 01:34:02,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:02,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662196650] [2020-10-27 01:34:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:03,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:03,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:03,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:34:03,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:03,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 01:34:03,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:34:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:34:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:03,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:03,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:03,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:03,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:03,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:34:03,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:03,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:03,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:03,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:03,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:03,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662196650] [2020-10-27 01:34:03,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:03,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:34:03,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018030688] [2020-10-27 01:34:03,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:34:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:03,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:34:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:34:03,264 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 01:34:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:03,470 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 01:34:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:34:03,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 01:34:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:03,471 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:34:03,471 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:34:03,472 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 [2020-10-27 01:34:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:34:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:34:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:34:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 01:34:03,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 01:34:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:03,479 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 01:34:03,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:34:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 01:34:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:34:03,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:03,480 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:03,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:34:03,480 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 01:34:03,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:03,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79231117] [2020-10-27 01:34:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:03,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:03,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:03,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:34:03,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:03,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 01:34:03,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:34:03,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:03,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:03,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:03,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:03,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:03,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:03,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:34:03,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:03,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:03,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:03,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:03,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79231117] [2020-10-27 01:34:03,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:03,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:03,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881053214] [2020-10-27 01:34:03,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:03,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:03,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:03,774 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 01:34:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:04,047 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:34:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:34:04,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:34:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:04,048 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:34:04,049 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:34:04,049 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 [2020-10-27 01:34:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:34:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:34:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:34:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:34:04,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 01:34:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:04,055 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:34:04,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:34:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:34:04,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:04,056 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:04,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:34:04,057 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 01:34:04,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:04,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809955879] [2020-10-27 01:34:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:04,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:04,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:04,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:34:04,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:04,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 01:34:04,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:04,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:04,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:04,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:04,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:04,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:04,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:04,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:04,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:04,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:04,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809955879] [2020-10-27 01:34:04,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:04,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:04,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096552372] [2020-10-27 01:34:04,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:04,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:04,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:04,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:04,394 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 01:34:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:04,685 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 01:34:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:04,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:34:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:04,686 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:34:04,686 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:34:04,687 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 [2020-10-27 01:34:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:34:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:34:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:34:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 01:34:04,693 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 01:34:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:04,694 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 01:34:04,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 01:34:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:34:04,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:04,695 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:04,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:34:04,695 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 01:34:04,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:04,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031824216] [2020-10-27 01:34:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:04,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:04,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:34:04,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:04,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 01:34:04,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:04,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:34:04,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:04,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:34:04,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:05,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:05,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:05,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:05,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:05,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:05,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031824216] [2020-10-27 01:34:05,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:05,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:34:05,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202499377] [2020-10-27 01:34:05,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:34:05,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:05,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:34:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:34:05,040 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-27 01:34:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:05,398 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 01:34:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:34:05,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-27 01:34:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:05,400 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:34:05,400 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:34:05,401 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 [2020-10-27 01:34:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:34:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:34:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:34:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 01:34:05,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 01:34:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:05,407 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 01:34:05,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:34:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 01:34:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:34:05,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:05,420 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:05,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:34:05,420 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-27 01:34:05,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:05,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380248183] [2020-10-27 01:34:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:34:05,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:05,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 01:34:05,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:34:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:05,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:34:05,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:05,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:05,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:05,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:05,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:05,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:05,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:05,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:05,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:05,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:05,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380248183] [2020-10-27 01:34:05,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:05,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:34:05,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142427230] [2020-10-27 01:34:05,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:34:05,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:34:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:05,955 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-27 01:34:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:06,428 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-27 01:34:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:34:06,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 01:34:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:06,429 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:34:06,429 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:34:06,430 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 [2020-10-27 01:34:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:34:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:34:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:34:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 01:34:06,436 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-27 01:34:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:06,436 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 01:34:06,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:34:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 01:34:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:34:06,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:06,437 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:06,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:34:06,438 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-27 01:34:06,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:06,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803786983] [2020-10-27 01:34:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:06,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:06,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:06,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:34:06,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:06,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-27 01:34:06,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:06,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:34:06,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:06,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:34:06,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:06,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:06,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:06,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:06,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:06,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:06,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:06,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803786983] [2020-10-27 01:34:06,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:06,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:34:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266044646] [2020-10-27 01:34:06,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:34:06,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:34:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:34:06,887 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-27 01:34:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:07,424 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 01:34:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:34:07,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-27 01:34:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:07,426 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:34:07,426 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:34:07,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:34:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:34:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:34:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:34:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 01:34:07,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-27 01:34:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:07,435 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 01:34:07,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:34:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 01:34:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:34:07,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:07,436 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:07,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:34:07,436 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:07,436 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-27 01:34:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:07,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444622677] [2020-10-27 01:34:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:07,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:07,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:34:07,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:07,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 01:34:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:34:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:34:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:07,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:07,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:07,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:07,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:07,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:07,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:07,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:07,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444622677] [2020-10-27 01:34:07,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:07,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:34:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154649752] [2020-10-27 01:34:07,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:34:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:34:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:07,947 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-27 01:34:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:08,483 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-27 01:34:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:34:08,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 01:34:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:08,484 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:34:08,484 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:34:08,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:34:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:34:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:34:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:34:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 01:34:08,493 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-27 01:34:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:08,493 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 01:34:08,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:34:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 01:34:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:34:08,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:08,494 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:08,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:34:08,494 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-27 01:34:08,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:08,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930491863] [2020-10-27 01:34:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:08,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:08,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:08,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:34:08,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:08,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-27 01:34:08,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:08,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:34:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:34:08,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:09,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:09,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:09,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:09,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:09,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:09,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:09,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:09,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:09,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:09,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:09,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:09,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930491863] [2020-10-27 01:34:09,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:09,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:34:09,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046755843] [2020-10-27 01:34:09,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:34:09,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:34:09,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:34:09,150 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-27 01:34:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:09,805 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 01:34:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:34:09,809 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-27 01:34:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:09,810 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:34:09,810 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:34:09,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:34:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:34:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:34:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:34:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 01:34:09,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-27 01:34:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:09,826 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 01:34:09,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:34:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 01:34:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:34:09,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:09,829 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:09,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:34:09,829 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-27 01:34:09,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:09,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861209603] [2020-10-27 01:34:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:09,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:10,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:10,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:34:10,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-27 01:34:10,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:34:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:34:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:10,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:10,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:10,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:10,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:10,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:10,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:10,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:10,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:34:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:10,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861209603] [2020-10-27 01:34:10,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:10,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:34:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343911898] [2020-10-27 01:34:10,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:34:10,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:34:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:34:10,574 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-27 01:34:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:11,288 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-27 01:34:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:34:11,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-27 01:34:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:11,289 INFO L225 Difference]: With dead ends: 31 [2020-10-27 01:34:11,290 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:34:11,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:34:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:34:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:34:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:34:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 01:34:11,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-27 01:34:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:11,298 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 01:34:11,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:34:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 01:34:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:34:11,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:11,299 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:11,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:34:11,300 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:11,300 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-27 01:34:11,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:11,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335630441] [2020-10-27 01:34:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:11,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:11,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:34:11,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:11,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 01:34:11,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:34:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:34:11,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:12,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:12,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:12,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:12,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:12,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:12,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:12,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:12,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:12,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335630441] [2020-10-27 01:34:12,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:12,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:34:12,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146717004] [2020-10-27 01:34:12,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:34:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:12,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:34:12,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:34:12,045 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-27 01:34:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:12,894 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 01:34:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:34:12,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-27 01:34:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:12,895 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:34:12,895 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:34:12,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:34:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:34:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 01:34:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:34:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 01:34:12,903 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-27 01:34:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:12,904 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 01:34:12,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:34:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 01:34:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:34:12,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:12,905 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:12,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:34:12,905 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-27 01:34:12,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:12,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429436357] [2020-10-27 01:34:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:13,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:13,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:34:13,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-27 01:34:13,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:34:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:34:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:13,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:13,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:13,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:13,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:13,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:13,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:13,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:13,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:13,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429436357] [2020-10-27 01:34:13,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:13,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:34:13,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637890566] [2020-10-27 01:34:13,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:34:13,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:13,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:34:13,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:34:13,846 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-27 01:34:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:14,779 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-27 01:34:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:34:14,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-27 01:34:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:14,781 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:34:14,781 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:34:14,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:34:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:34:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:34:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:34:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 01:34:14,789 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-27 01:34:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:14,790 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 01:34:14,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:34:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 01:34:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:34:14,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:14,791 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:14,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:34:14,791 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-27 01:34:14,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:14,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685321807] [2020-10-27 01:34:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:14,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:15,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:15,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:34:15,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:15,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-27 01:34:15,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:15,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:34:15,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:15,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:34:15,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:15,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:15,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:15,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:15,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:15,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:15,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:15,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:15,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685321807] [2020-10-27 01:34:15,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:15,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:34:15,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645598710] [2020-10-27 01:34:15,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:34:15,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:15,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:34:15,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:34:15,734 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-27 01:34:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:16,710 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 01:34:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:34:16,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-27 01:34:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:16,712 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:34:16,712 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:34:16,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:34:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:34:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 01:34:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:34:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 01:34:16,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-27 01:34:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:16,720 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 01:34:16,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:34:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 01:34:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:34:16,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:16,721 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:16,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:34:16,722 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-27 01:34:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:16,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574228997] [2020-10-27 01:34:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:16,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:17,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:34:17,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:17,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-27 01:34:17,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:17,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:34:17,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:17,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:34:17,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:17,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:17,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:17,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:17,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:17,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:17,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:17,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:17,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:17,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:17,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:17,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574228997] [2020-10-27 01:34:17,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:17,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:34:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052734053] [2020-10-27 01:34:17,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:34:17,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:34:17,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:34:17,792 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-27 01:34:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:18,824 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-27 01:34:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:34:18,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-27 01:34:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:18,826 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:34:18,826 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:34:18,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:34:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:34:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:34:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:34:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 01:34:18,835 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-27 01:34:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:18,835 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 01:34:18,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:34:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 01:34:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:34:18,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:18,836 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:18,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:34:18,837 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-27 01:34:18,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:18,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472839993] [2020-10-27 01:34:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:18,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:19,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:34:19,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:19,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-27 01:34:19,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:34:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:34:19,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:19,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:19,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:19,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:19,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:19,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:34:19,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:19,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:19,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:19,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:19,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:19,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472839993] [2020-10-27 01:34:19,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:19,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:34:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817644223] [2020-10-27 01:34:19,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:34:19,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:19,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:34:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:34:19,867 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-27 01:34:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:21,020 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 01:34:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:34:21,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-27 01:34:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:21,022 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:34:21,022 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:34:21,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:34:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:34:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:34:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:34:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 01:34:21,030 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-27 01:34:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:21,030 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 01:34:21,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:34:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 01:34:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:34:21,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:21,031 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:21,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:34:21,031 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-27 01:34:21,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:21,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555740723] [2020-10-27 01:34:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:21,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:21,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:34:21,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:21,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-27 01:34:21,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:21,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:34:21,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:21,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:34:21,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:22,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:22,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:22,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555740723] [2020-10-27 01:34:22,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:22,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:34:22,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063108515] [2020-10-27 01:34:22,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:34:22,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:22,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:34:22,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:34:22,113 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-27 01:34:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:23,292 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 01:34:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:34:23,292 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-27 01:34:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:23,293 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:34:23,293 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:34:23,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:34:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:34:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:34:23,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:34:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 01:34:23,305 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-27 01:34:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:23,305 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 01:34:23,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:34:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 01:34:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:34:23,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:23,309 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:23,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:34:23,310 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:23,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-27 01:34:23,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:23,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787621164] [2020-10-27 01:34:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:23,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:34:23,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:24,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:24,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:24,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:24,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:24,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:24,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:24,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:24,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787621164] [2020-10-27 01:34:24,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:24,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:34:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369510431] [2020-10-27 01:34:24,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:34:24,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:34:24,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:34:24,507 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-27 01:34:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:25,775 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:34:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:34:25,776 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-27 01:34:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:25,776 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:34:25,777 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:34:25,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:34:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:34:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 01:34:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:34:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 01:34:25,785 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-27 01:34:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:25,785 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 01:34:25,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:34:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 01:34:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:34:25,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:25,786 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:25,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:34:25,787 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:25,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-27 01:34:25,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:25,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664372880] [2020-10-27 01:34:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:25,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:26,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:26,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:34:26,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:26,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-27 01:34:26,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:26,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:34:26,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:26,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:34:26,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:27,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:27,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:27,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:27,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:27,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:27,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:27,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:27,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:27,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664372880] [2020-10-27 01:34:27,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:27,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:34:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979673227] [2020-10-27 01:34:27,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:34:27,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:27,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:34:27,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:34:27,290 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-27 01:34:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:28,606 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-27 01:34:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:34:28,606 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-27 01:34:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:28,607 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:34:28,607 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:34:28,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:34:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:34:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:34:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:34:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 01:34:28,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-27 01:34:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:28,617 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 01:34:28,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:34:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 01:34:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:34:28,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:28,618 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:28,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:34:28,619 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-27 01:34:28,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:28,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652293846] [2020-10-27 01:34:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:28,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:29,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:29,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:34:29,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:29,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-27 01:34:29,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:34:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:34:29,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:30,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:30,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:30,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:30,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:30,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:30,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:30,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:30,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:30,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652293846] [2020-10-27 01:34:30,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:30,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:34:30,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718198008] [2020-10-27 01:34:30,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:34:30,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:34:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:34:30,062 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-27 01:34:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:31,637 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:34:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:34:31,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-27 01:34:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:31,644 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:34:31,644 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:34:31,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:34:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:34:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 01:34:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:34:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 01:34:31,659 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-27 01:34:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:31,659 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 01:34:31,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:34:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 01:34:31,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:34:31,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:31,660 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:31,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:34:31,660 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-27 01:34:31,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:31,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335861794] [2020-10-27 01:34:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:31,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:32,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:32,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:34:32,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:32,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-27 01:34:32,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:34:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:34:32,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:33,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:33,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:33,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:33,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:33,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:33,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:33,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335861794] [2020-10-27 01:34:33,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:33,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:34:33,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500924201] [2020-10-27 01:34:33,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:34:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:33,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:34:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:34:33,320 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-27 01:34:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:34,990 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-27 01:34:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:34:34,990 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-27 01:34:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:34,991 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:34:34,991 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:34:34,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:34:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:34:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:34:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:34:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 01:34:35,000 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-27 01:34:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:35,000 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 01:34:35,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:34:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 01:34:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:34:35,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:35,001 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:35,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:34:35,001 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-27 01:34:35,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:35,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503600221] [2020-10-27 01:34:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:36,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:34:36,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-10-27 01:34:36,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:34:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:34:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:36,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:36,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:36,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:36,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503600221] [2020-10-27 01:34:36,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:36,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:34:36,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419425648] [2020-10-27 01:34:36,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:34:36,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:34:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:34:36,736 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-27 01:34:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:38,426 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 01:34:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:34:38,426 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-27 01:34:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:38,427 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:34:38,427 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:34:38,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:34:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:34:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 01:34:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:34:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 01:34:38,434 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-27 01:34:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:38,435 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 01:34:38,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:34:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 01:34:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:34:38,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:38,435 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:38,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:34:38,436 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:38,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-27 01:34:38,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:38,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779782835] [2020-10-27 01:34:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:38,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:39,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:39,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:34:39,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:39,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1297 [2020-10-27 01:34:39,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:39,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:34:39,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:39,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:34:39,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:40,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:40,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:40,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:40,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779782835] [2020-10-27 01:34:40,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:40,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:34:40,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083114105] [2020-10-27 01:34:40,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:34:40,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:40,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:34:40,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:34:40,448 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-27 01:34:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:42,313 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-27 01:34:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:34:42,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-27 01:34:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:42,314 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:34:42,314 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:34:42,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:34:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:34:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:34:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:34:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 01:34:42,323 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-27 01:34:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:42,324 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 01:34:42,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:34:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 01:34:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:34:42,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:42,324 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:42,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:34:42,325 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-27 01:34:42,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:42,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538691173] [2020-10-27 01:34:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:42,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:43,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:34:43,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-27 01:34:43,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:34:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:43,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:34:43,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:44,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:44,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:44,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538691173] [2020-10-27 01:34:44,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:44,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:34:44,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601320652] [2020-10-27 01:34:44,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:34:44,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:44,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:34:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:34:44,512 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-27 01:34:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:46,624 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 01:34:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:34:46,626 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-27 01:34:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:46,627 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:34:46,627 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:34:46,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:34:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:34:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:34:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:34:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 01:34:46,635 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-27 01:34:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:46,635 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 01:34:46,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:34:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 01:34:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:34:46,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:46,639 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:46,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:34:46,639 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:46,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-27 01:34:46,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:46,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238714050] [2020-10-27 01:34:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:47,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:47,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:34:47,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:47,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1128 [2020-10-27 01:34:47,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:34:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:34:47,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:48,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:48,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:48,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:48,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238714050] [2020-10-27 01:34:48,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:48,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:34:48,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171261381] [2020-10-27 01:34:48,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:34:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:34:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:34:48,582 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-27 01:34:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:50,642 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-27 01:34:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:34:50,643 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-27 01:34:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:50,643 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:34:50,643 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:34:50,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:34:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:34:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:34:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:34:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 01:34:50,652 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-27 01:34:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:50,652 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 01:34:50,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:34:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 01:34:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:34:50,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:50,653 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:50,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:34:50,653 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-27 01:34:50,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:50,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610515615] [2020-10-27 01:34:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:51,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:51,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:34:51,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:51,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-27 01:34:51,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:34:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:34:51,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:52,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:52,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:52,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:52,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:52,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:52,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:52,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610515615] [2020-10-27 01:34:52,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:52,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:34:52,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909939251] [2020-10-27 01:34:52,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:34:52,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:34:52,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:34:52,869 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-27 01:34:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:55,246 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:34:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:34:55,247 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-27 01:34:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:55,247 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:34:55,248 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:34:55,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:34:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:34:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:34:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:34:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 01:34:55,256 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-27 01:34:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:55,257 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 01:34:55,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:34:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 01:34:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:34:55,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:55,257 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:55,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:34:55,258 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-27 01:34:55,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:55,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812526545] [2020-10-27 01:34:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:55,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:56,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:56,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:34:56,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:56,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-27 01:34:56,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:56,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:34:56,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:56,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:34:56,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:57,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:57,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:57,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812526545] [2020-10-27 01:34:57,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:57,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:34:57,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939465338] [2020-10-27 01:34:57,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:34:57,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:34:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:34:57,508 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-27 01:34:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:59,900 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-27 01:34:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:34:59,901 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-27 01:34:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:59,902 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:34:59,902 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:34:59,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:34:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:34:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:34:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:34:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 01:34:59,911 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-27 01:34:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:59,911 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 01:34:59,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:34:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 01:34:59,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:34:59,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:59,912 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:59,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:34:59,912 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:59,913 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-27 01:34:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:59,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858740968] [2020-10-27 01:34:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:59,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1745 [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:35:01,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:02,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:02,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:02,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:02,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:02,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:02,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:02,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:02,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:02,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858740968] [2020-10-27 01:35:02,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:02,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:35:02,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906960186] [2020-10-27 01:35:02,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:35:02,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:35:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:35:02,682 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-27 01:35:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:05,268 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 01:35:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:35:05,269 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-27 01:35:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:05,270 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:35:05,270 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:35:05,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:35:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:35:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:35:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:35:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 01:35:05,278 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-27 01:35:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:05,278 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 01:35:05,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:35:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 01:35:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:35:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:05,279 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:05,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:35:05,279 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-27 01:35:05,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:05,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017826758] [2020-10-27 01:35:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:35:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:07,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:07,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:07,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017826758] [2020-10-27 01:35:07,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:07,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:35:07,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322988745] [2020-10-27 01:35:07,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:35:07,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:07,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:35:07,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:35:07,784 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-27 01:35:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:10,550 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-27 01:35:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:35:10,551 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-27 01:35:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:10,552 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:35:10,552 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:35:10,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:35:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:35:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:35:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:35:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 01:35:10,558 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-27 01:35:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:10,559 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 01:35:10,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:35:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 01:35:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:35:10,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:10,560 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:10,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:35:10,560 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:10,560 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-27 01:35:10,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:10,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108975363] [2020-10-27 01:35:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:12,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:12,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:35:12,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:12,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-27 01:35:12,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:12,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:35:12,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:12,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:35:12,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:13,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:13,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:13,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:13,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:13,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108975363] [2020-10-27 01:35:13,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:13,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:35:13,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960695964] [2020-10-27 01:35:13,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:35:13,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:13,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:35:13,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:35:13,114 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-27 01:35:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:15,864 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 01:35:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:35:15,865 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-27 01:35:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:15,866 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:35:15,866 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:35:15,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:35:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:35:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 01:35:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:35:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 01:35:15,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-27 01:35:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:15,876 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 01:35:15,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:35:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 01:35:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:35:15,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:15,876 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:15,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:35:15,877 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:15,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-27 01:35:15,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:15,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245431432] [2020-10-27 01:35:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:17,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:17,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:35:17,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:18,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:18,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:18,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:18,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:18,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:18,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245431432] [2020-10-27 01:35:18,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:18,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:35:18,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226445610] [2020-10-27 01:35:18,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:35:18,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:35:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:35:18,630 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-27 01:35:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:21,803 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-27 01:35:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:35:21,804 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-27 01:35:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:21,805 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:35:21,805 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:35:21,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:35:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:35:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:35:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:35:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 01:35:21,813 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-27 01:35:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:21,814 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 01:35:21,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:35:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 01:35:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:35:21,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:21,815 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:21,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:35:21,815 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:21,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-27 01:35:21,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:21,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756462020] [2020-10-27 01:35:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:21,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:23,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:35:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:24,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:24,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:24,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:24,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:24,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:24,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:24,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:24,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756462020] [2020-10-27 01:35:24,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:24,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:35:24,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698439139] [2020-10-27 01:35:24,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:35:24,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:35:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:35:24,745 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-27 01:35:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:27,900 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 01:35:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:35:27,900 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-27 01:35:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:27,901 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:35:27,902 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:35:27,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:35:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:35:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 01:35:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:35:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 01:35:27,909 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-27 01:35:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:27,909 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 01:35:27,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:35:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 01:35:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:35:27,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:27,910 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:27,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:35:27,910 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:27,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-27 01:35:27,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:27,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798596087] [2020-10-27 01:35:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:27,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:30,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2128 [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:35:30,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:31,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:31,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:31,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:31,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:31,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:31,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:31,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798596087] [2020-10-27 01:35:31,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:31,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:35:31,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935758286] [2020-10-27 01:35:31,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:35:31,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:31,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:35:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:35:31,371 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-27 01:35:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:34,660 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-27 01:35:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:35:34,661 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-27 01:35:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:34,662 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:35:34,662 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:35:34,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:35:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:35:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:35:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:35:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 01:35:34,669 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-27 01:35:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:34,669 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 01:35:34,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:35:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 01:35:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:35:34,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:34,670 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:34,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:35:34,670 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-27 01:35:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:34,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805842240] [2020-10-27 01:35:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:34,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2359 [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:35:37,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:38,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:38,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:38,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:38,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:38,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805842240] [2020-10-27 01:35:38,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:38,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:35:38,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71716930] [2020-10-27 01:35:38,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:35:38,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:38,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:35:38,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:35:38,422 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-27 01:35:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:42,018 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 01:35:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:35:42,019 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-27 01:35:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:42,020 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:35:42,020 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:35:42,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:35:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:35:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:35:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:35:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 01:35:42,028 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-27 01:35:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:42,028 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 01:35:42,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:35:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 01:35:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:35:42,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:42,029 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:42,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:35:42,029 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-27 01:35:42,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:42,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028822901] [2020-10-27 01:35:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:42,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:44,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:44,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:35:44,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:44,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2801 [2020-10-27 01:35:44,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:44,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:35:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:35:44,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:46,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:46,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:46,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:46,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:46,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:46,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:46,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:46,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028822901] [2020-10-27 01:35:46,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:46,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:35:46,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521325031] [2020-10-27 01:35:46,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:35:46,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:35:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:35:46,230 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-27 01:35:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:49,900 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-27 01:35:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:35:49,901 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-27 01:35:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:49,902 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:35:49,902 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:35:49,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:35:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:35:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:35:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:35:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 01:35:49,909 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-27 01:35:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:49,909 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 01:35:49,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:35:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 01:35:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:35:49,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:49,909 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:49,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:35:49,910 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:49,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:49,910 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-27 01:35:49,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:49,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939486800] [2020-10-27 01:35:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:53,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:53,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:35:53,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:53,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3215 [2020-10-27 01:35:53,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:35:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:35:53,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:54,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:54,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:54,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:54,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:54,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939486800] [2020-10-27 01:35:54,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:54,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:35:54,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846709399] [2020-10-27 01:35:54,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:35:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:54,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:35:54,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:35:54,618 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-27 01:35:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:58,440 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 01:35:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:35:58,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-27 01:35:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:58,441 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:35:58,441 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:35:58,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:35:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:35:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 01:35:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:35:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 01:35:58,448 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-27 01:35:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:58,449 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 01:35:58,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:35:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 01:35:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:35:58,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:58,449 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:58,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:35:58,449 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-27 01:35:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:58,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528632267] [2020-10-27 01:35:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:58,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2405 [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:36:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:02,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:02,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:02,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:02,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528632267] [2020-10-27 01:36:02,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:02,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:36:02,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809253459] [2020-10-27 01:36:02,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:36:02,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:02,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:36:02,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:36:02,425 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-27 01:36:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:06,710 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-27 01:36:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:36:06,711 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-27 01:36:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:06,712 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:36:06,712 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:36:06,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:36:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:36:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:36:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:36:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 01:36:06,721 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-27 01:36:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:06,721 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 01:36:06,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:36:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 01:36:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:36:06,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:06,722 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:06,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:36:06,722 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-27 01:36:06,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:06,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191930654] [2020-10-27 01:36:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:06,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:09,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:09,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:36:09,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:09,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2481 [2020-10-27 01:36:09,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:36:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:36:09,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:10,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:10,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:10,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:10,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:10,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:10,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:10,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:10,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:10,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:10,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:10,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:10,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191930654] [2020-10-27 01:36:10,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:10,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:36:10,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198956807] [2020-10-27 01:36:10,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:36:10,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:10,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:36:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:36:10,816 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-27 01:36:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:15,090 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 01:36:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:36:15,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-27 01:36:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:15,092 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:36:15,092 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:36:15,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:36:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:36:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:36:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:36:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 01:36:15,102 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-27 01:36:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:15,102 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 01:36:15,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:36:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 01:36:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:36:15,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:15,103 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:15,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:36:15,103 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-27 01:36:15,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:15,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587836452] [2020-10-27 01:36:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:15,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:17,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:17,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:36:17,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:17,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2667 [2020-10-27 01:36:17,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:17,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:36:17,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:17,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:36:17,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:19,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:19,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:19,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:19,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587836452] [2020-10-27 01:36:19,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:19,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:36:19,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830094536] [2020-10-27 01:36:19,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:36:19,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:36:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:36:19,521 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-27 01:36:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:23,798 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-27 01:36:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:36:23,798 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-27 01:36:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:23,799 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:36:23,799 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:36:23,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:36:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:36:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:36:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:36:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 01:36:23,808 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-27 01:36:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:23,808 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 01:36:23,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:36:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 01:36:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:36:23,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:23,809 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:23,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:36:23,809 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-27 01:36:23,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:23,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500190087] [2020-10-27 01:36:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:27,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:27,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:36:27,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:27,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3948 [2020-10-27 01:36:27,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:27,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:36:27,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:27,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:36:27,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:29,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:29,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:29,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:29,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500190087] [2020-10-27 01:36:29,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:29,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:36:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282837562] [2020-10-27 01:36:29,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:36:29,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:36:29,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:36:29,623 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-27 01:36:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:34,302 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 01:36:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:36:34,303 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-27 01:36:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:34,303 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:36:34,304 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:36:34,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:36:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:36:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 01:36:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:36:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 01:36:34,310 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-27 01:36:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:34,310 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 01:36:34,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:36:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 01:36:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:36:34,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:34,311 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:34,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:36:34,311 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-27 01:36:34,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:34,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347578552] [2020-10-27 01:36:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:34,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:38,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:38,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:36:38,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:38,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3851 [2020-10-27 01:36:38,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:38,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:36:38,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:38,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:36:38,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:40,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:40,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:40,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:40,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:40,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:40,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:40,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:40,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:40,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347578552] [2020-10-27 01:36:40,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:40,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:36:40,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066822626] [2020-10-27 01:36:40,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:36:40,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:40,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:36:40,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:36:40,038 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-27 01:36:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:45,147 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 01:36:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:36:45,148 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-27 01:36:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:45,149 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:36:45,149 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:36:45,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:36:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:36:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:36:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:36:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 01:36:45,158 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-27 01:36:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:45,159 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 01:36:45,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:36:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 01:36:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:36:45,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:45,160 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:45,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:36:45,160 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:45,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:45,160 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-27 01:36:45,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:45,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102659854] [2020-10-27 01:36:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:45,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:49,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4067 [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:36:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:51,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:51,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:51,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:51,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:36:51,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:51,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:51,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:51,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:51,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:51,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102659854] [2020-10-27 01:36:51,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:51,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:36:51,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688725318] [2020-10-27 01:36:51,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:36:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:36:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:36:51,301 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-27 01:36:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:56,703 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 01:36:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:36:56,704 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-27 01:36:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:56,705 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:36:56,705 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:36:56,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:36:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:36:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:36:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:36:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 01:36:56,714 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-27 01:36:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:56,714 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 01:36:56,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:36:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 01:36:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:36:56,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:56,715 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:56,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:36:56,715 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:56,716 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-27 01:36:56,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:56,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038133415] [2020-10-27 01:36:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:56,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:00,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:00,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:37:00,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:00,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4210 [2020-10-27 01:37:00,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:00,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:37:00,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:37:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:37:00,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:03,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:03,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:03,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:03,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038133415] [2020-10-27 01:37:03,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:03,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:37:03,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512259248] [2020-10-27 01:37:03,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:37:03,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:03,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:37:03,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:37:03,103 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-27 01:37:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:08,667 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-27 01:37:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:37:08,668 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-27 01:37:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:08,669 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:37:08,669 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:37:08,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:37:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:37:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:37:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:37:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 01:37:08,677 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-27 01:37:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:08,677 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 01:37:08,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:37:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 01:37:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:37:08,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:08,678 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:08,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:37:08,678 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-27 01:37:08,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:08,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817949246] [2020-10-27 01:37:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:08,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4232 [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:37:12,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:15,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:15,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:15,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:15,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:15,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:15,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:15,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:15,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:15,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:15,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:15,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817949246] [2020-10-27 01:37:15,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:15,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:37:15,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486281614] [2020-10-27 01:37:15,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:37:15,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:15,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:37:15,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:37:15,218 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-27 01:37:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:21,138 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 01:37:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:37:21,139 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-27 01:37:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:21,140 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:37:21,140 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:37:21,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:37:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:37:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 01:37:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:37:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 01:37:21,149 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-27 01:37:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:21,149 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 01:37:21,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:37:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 01:37:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:37:21,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:21,149 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:21,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:37:21,150 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:21,150 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-27 01:37:21,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:21,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709123084] [2020-10-27 01:37:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:37:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:28,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:28,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:28,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:28,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:28,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:28,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:28,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:28,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:28,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:28,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:28,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709123084] [2020-10-27 01:37:28,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:28,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:37:28,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781088346] [2020-10-27 01:37:28,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:37:28,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:28,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:37:28,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:37:28,539 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-27 01:37:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:34,754 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-27 01:37:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:37:34,755 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-27 01:37:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:34,756 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:37:34,756 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:37:34,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:37:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:37:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:37:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:37:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 01:37:34,764 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-27 01:37:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:34,764 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 01:37:34,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:37:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 01:37:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:37:34,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:34,765 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:34,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:37:34,765 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-27 01:37:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:34,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403743984] [2020-10-27 01:37:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:34,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:39,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:39,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:37:39,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:39,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 01:37:39,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:39,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:37:39,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:37:39,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:37:39,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:42,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:42,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:42,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:42,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:42,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:42,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:42,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:42,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403743984] [2020-10-27 01:37:42,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:42,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:37:42,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729232509] [2020-10-27 01:37:42,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:37:42,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:42,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:37:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:37:42,271 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-27 01:37:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:48,569 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 01:37:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:37:48,569 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-27 01:37:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:48,571 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:37:48,571 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:37:48,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:37:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:37:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 01:37:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:37:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 01:37:48,580 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-27 01:37:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:48,581 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 01:37:48,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:37:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 01:37:48,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:37:48,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:48,581 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:48,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:37:48,582 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:48,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:48,582 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-27 01:37:48,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:48,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823032485] [2020-10-27 01:37:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:48,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking...