/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-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:40:57,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:40:57,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:40:57,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:40:57,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:40:57,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:40:57,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:40:57,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:40:57,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:40:57,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:40:57,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:40:57,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:40:57,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:40:57,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:40:57,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:40:57,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:40:57,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:40:57,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:40:57,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:40:57,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:40:57,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:40:57,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:40:57,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:40:57,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:40:57,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:40:57,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:40:57,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:40:57,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:40:57,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:40:57,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:40:57,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:40:57,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:40:57,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:40:57,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:40:57,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:40:57,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:40:57,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:40:57,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:40:57,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:40:57,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:40:57,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:40:57,320 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 01:40:57,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:40:57,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:40:57,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:40:57,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:40:57,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:40:57,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:40:57,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:40:57,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:40:57,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:40:57,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:40:57,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:40:57,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:40:57,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:40:57,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:40:57,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:40:57,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:40:57,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:40:57,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:40:57,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:40:57,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:40:57,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:40:57,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:40:57,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:40:57,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:40:57,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:40:57,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:40:57,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:40:57,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:40:57,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:40:57,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:40:57,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:40:57,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:40:57,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:40:57,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:40:57,904 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:40:57,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2020-10-27 01:40:57,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/801fbafbd/9df67ddc5c7e4ecba2f7f9737e69ab48/FLAGa7dd6a265 [2020-10-27 01:40:58,560 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:40:58,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2020-10-27 01:40:58,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/801fbafbd/9df67ddc5c7e4ecba2f7f9737e69ab48/FLAGa7dd6a265 [2020-10-27 01:40:58,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/801fbafbd/9df67ddc5c7e4ecba2f7f9737e69ab48 [2020-10-27 01:40:58,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:40:58,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:40:58,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:58,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:40:58,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:40:58,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:58" (1/1) ... [2020-10-27 01:40:58,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104476a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:58, skipping insertion in model container [2020-10-27 01:40:58,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:58" (1/1) ... [2020-10-27 01:40:58,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:40:58,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:40:59,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:59,166 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:40:59,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:59,210 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:40:59,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59 WrapperNode [2020-10-27 01:40:59,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:59,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:40:59,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:40:59,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:40:59,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (1/1) ... [2020-10-27 01:40:59,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (1/1) ... [2020-10-27 01:40:59,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (1/1) ... [2020-10-27 01:40:59,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (1/1) ... [2020-10-27 01:40:59,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (1/1) ... [2020-10-27 01:40:59,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (1/1) ... [2020-10-27 01:40:59,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (1/1) ... [2020-10-27 01:40:59,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:40:59,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:40:59,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:40:59,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:40:59,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (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 01:40:59,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:40:59,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:40:59,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:40:59,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:40:59,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:40:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:40:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:40:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:40:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:40:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:40:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:40:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:40:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:40:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:40:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:40:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:40:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:40:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:40:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:40:59,806 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:40:59,806 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 01:40:59,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:59 BoogieIcfgContainer [2020-10-27 01:40:59,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:40:59,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:40:59,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:40:59,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:40:59,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:40:58" (1/3) ... [2020-10-27 01:40:59,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4116ca43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:59, skipping insertion in model container [2020-10-27 01:40:59,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:59" (2/3) ... [2020-10-27 01:40:59,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4116ca43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:59, skipping insertion in model container [2020-10-27 01:40:59,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:59" (3/3) ... [2020-10-27 01:40:59,835 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2020-10-27 01:40:59,869 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:40:59,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:40:59,903 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:40:59,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:40:59,955 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:40:59,955 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:40:59,955 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:40:59,955 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:40:59,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:40:59,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:40:59,956 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:40:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 01:41:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:41:00,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:00,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:00,002 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:00,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2131728234, now seen corresponding path program 1 times [2020-10-27 01:41:00,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:00,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116545703] [2020-10-27 01:41:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:00,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:01,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:41:01,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:01,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1702 [2020-10-27 01:41:01,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:41:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:41:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:41:02,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:02,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:02,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:02,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:41:02,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:02,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:02,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:02,096 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 01:41:02,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116545703] [2020-10-27 01:41:02,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:02,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:41:02,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111534393] [2020-10-27 01:41:02,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:41:02,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:02,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:41:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:41:02,131 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-10-27 01:41:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:02,468 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2020-10-27 01:41:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:41:02,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-27 01:41:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:02,481 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:41:02,481 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:41:02,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:41:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:41:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:41:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:41:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 01:41:02,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 28 [2020-10-27 01:41:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:02,537 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 01:41:02,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:41:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 01:41:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:41:02,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:02,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:02,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:41:02,540 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 11824253, now seen corresponding path program 1 times [2020-10-27 01:41:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103414014] [2020-10-27 01:41:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:02,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:03,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:03,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:41:03,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:03,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-27 01:41:03,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:03,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:41:03,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:03,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:41:03,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:03,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:03,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:03,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:03,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:03,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:03,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:41:03,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:03,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:03,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:03,389 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 01:41:03,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103414014] [2020-10-27 01:41:03,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:03,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:41:03,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093600728] [2020-10-27 01:41:03,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:41:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:41:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:41:03,394 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 6 states. [2020-10-27 01:41:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:03,646 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-27 01:41:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:41:03,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-27 01:41:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:03,648 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:41:03,649 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:41:03,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:41:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:41:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:41:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:41:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-27 01:41:03,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 28 [2020-10-27 01:41:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:03,659 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-27 01:41:03,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:41:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-27 01:41:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:41:03,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:03,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:03,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:41:03,661 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash 474540590, now seen corresponding path program 1 times [2020-10-27 01:41:03,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:03,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782434516] [2020-10-27 01:41:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:03,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:03,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:03,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:04,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:41:04,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:41:04,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-27 01:41:04,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:04,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:41:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:41:04,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:04,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:04,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:04,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:04,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:04,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:41:04,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:04,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:04,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:04,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:04,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:04,194 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 01:41:04,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782434516] [2020-10-27 01:41:04,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:04,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:41:04,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409272921] [2020-10-27 01:41:04,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:41:04,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:04,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:41:04,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:41:04,198 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 8 states. [2020-10-27 01:41:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:04,534 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-10-27 01:41:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:41:04,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-27 01:41:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:04,536 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:41:04,536 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:41:04,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:41:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:41:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:41:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:41:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-27 01:41:04,545 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 28 [2020-10-27 01:41:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:04,545 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-27 01:41:04,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:41:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-27 01:41:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:41:04,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:04,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:04,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:41:04,548 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash 605448819, now seen corresponding path program 1 times [2020-10-27 01:41:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:04,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217301517] [2020-10-27 01:41:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:04,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:04,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:41:04,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:41:04,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 01:41:04,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:04,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:41:04,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:04,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:41:04,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:05,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:05,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:41:05,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:05,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:05,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:05,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,079 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 01:41:05,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217301517] [2020-10-27 01:41:05,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:05,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 01:41:05,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663156421] [2020-10-27 01:41:05,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:41:05,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:41:05,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:41:05,090 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 10 states. [2020-10-27 01:41:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:05,493 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-27 01:41:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:41:05,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:41:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:05,494 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:41:05,494 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:41:05,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:41:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:41:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:41:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:41:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-27 01:41:05,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-10-27 01:41:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:05,502 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-27 01:41:05,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:41:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-27 01:41:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:41:05,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:05,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:05,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:41:05,504 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1918271156, now seen corresponding path program 1 times [2020-10-27 01:41:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:05,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842210793] [2020-10-27 01:41:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:05,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:41:05,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 01:41:05,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 01:41:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:41:05,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:05,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:05,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:05,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:41:05,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,623 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 01:41:05,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842210793] [2020-10-27 01:41:05,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:05,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:41:05,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965232857] [2020-10-27 01:41:05,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:41:05,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:41:05,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:41:05,626 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-10-27 01:41:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:05,741 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-27 01:41:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:41:05,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 01:41:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:05,743 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:41:05,743 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:41:05,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 01:41:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:41:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-27 01:41:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:41:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-27 01:41:05,752 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2020-10-27 01:41:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:05,753 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-27 01:41:05,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:41:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-27 01:41:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:41:05,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:05,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:05,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:41:05,754 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:05,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1900724257, now seen corresponding path program 1 times [2020-10-27 01:41:05,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:05,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311517268] [2020-10-27 01:41:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:41:05,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:05,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 01:41:05,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:41:05,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:06,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:06,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:06,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:06,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:06,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:06,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:06,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:06,071 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 01:41:06,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311517268] [2020-10-27 01:41:06,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:06,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 01:41:06,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187871927] [2020-10-27 01:41:06,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:06,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:06,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:06,074 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 12 states. [2020-10-27 01:41:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:06,503 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-27 01:41:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:06,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 01:41:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:06,504 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:41:06,504 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:41:06,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:41:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:41:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:41:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 01:41:06,512 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-27 01:41:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:06,512 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 01:41:06,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 01:41:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:41:06,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:06,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:06,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:41:06,514 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1152364942, now seen corresponding path program 1 times [2020-10-27 01:41:06,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:06,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906757950] [2020-10-27 01:41:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:06,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:06,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:06,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:41:06,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:06,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-27 01:41:06,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:06,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:41:06,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:06,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:41:06,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:06,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:06,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:06,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:06,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:06,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:06,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:41:06,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:06,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:06,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:06,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:06,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:06,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906757950] [2020-10-27 01:41:06,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:06,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 01:41:06,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957301808] [2020-10-27 01:41:06,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:41:06,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:06,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:41:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:41:06,867 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 13 states. [2020-10-27 01:41:07,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:07,380 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:41:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:41:07,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 01:41:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:07,381 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:41:07,381 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:41:07,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:41:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:41:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:41:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:41:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 01:41:07,390 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-27 01:41:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:07,390 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 01:41:07,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:41:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 01:41:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:07,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:07,392 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:07,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:41:07,392 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2076555349, now seen corresponding path program 1 times [2020-10-27 01:41:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:07,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436132404] [2020-10-27 01:41:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:07,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:41:07,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 01:41:07,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:41:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:41:07,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:07,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:07,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:07,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:41:07,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436132404] [2020-10-27 01:41:07,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:07,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:41:07,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976335576] [2020-10-27 01:41:07,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:41:07,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:41:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:41:07,797 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2020-10-27 01:41:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:08,390 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-27 01:41:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:41:08,390 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 01:41:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:08,391 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:41:08,392 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:41:08,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:41:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:41:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:41:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:41:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 01:41:08,401 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-27 01:41:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:08,402 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 01:41:08,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:41:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 01:41:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:41:08,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:08,403 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:08,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:41:08,403 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:08,404 INFO L82 PathProgramCache]: Analyzing trace with hash -192400008, now seen corresponding path program 2 times [2020-10-27 01:41:08,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:08,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509050816] [2020-10-27 01:41:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:08,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:08,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:08,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:08,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 01:41:08,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:08,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:41:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:08,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:08,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:08,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:08,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:08,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:08,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:08,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:08,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:08,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:08,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:08,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509050816] [2020-10-27 01:41:08,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:08,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:41:08,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614916698] [2020-10-27 01:41:08,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:41:08,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:41:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:41:08,826 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2020-10-27 01:41:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:09,448 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 01:41:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:41:09,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:41:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:09,449 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:41:09,450 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:41:09,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:41:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:41:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:41:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:41:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 01:41:09,475 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-27 01:41:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:09,478 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 01:41:09,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:41:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 01:41:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:41:09,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:09,481 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:09,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:41:09,481 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1184888283, now seen corresponding path program 3 times [2020-10-27 01:41:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:09,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797713029] [2020-10-27 01:41:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:09,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:09,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:09,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:09,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:41:09,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:09,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 01:41:09,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:41:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:41:09,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:09,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:09,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:09,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:09,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:09,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:09,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:09,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:10,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:10,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797713029] [2020-10-27 01:41:10,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:10,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:41:10,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674026462] [2020-10-27 01:41:10,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:41:10,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:10,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:41:10,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:41:10,009 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 16 states. [2020-10-27 01:41:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:10,660 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-27 01:41:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:41:10,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-27 01:41:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:10,662 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:41:10,662 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:41:10,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:41:10,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:41:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:41:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:41:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 01:41:10,677 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-27 01:41:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:10,677 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 01:41:10,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:41:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 01:41:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:41:10,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:10,679 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:10,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:41:10,679 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1909008766, now seen corresponding path program 4 times [2020-10-27 01:41:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:10,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408191165] [2020-10-27 01:41:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:10,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:11,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:41:11,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:11,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-27 01:41:11,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:11,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:41:11,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:11,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:41:11,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:11,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:11,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:11,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:11,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:41:11,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:11,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408191165] [2020-10-27 01:41:11,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:11,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:41:11,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027062089] [2020-10-27 01:41:11,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:41:11,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:41:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:41:11,234 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 17 states. [2020-10-27 01:41:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:11,913 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-27 01:41:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:41:11,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 01:41:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:11,915 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:41:11,915 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:41:11,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:41:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:41:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:41:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:41:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 01:41:11,929 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-27 01:41:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:11,929 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 01:41:11,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:41:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 01:41:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:41:11,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:11,933 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:11,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:41:11,933 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2004090977, now seen corresponding path program 5 times [2020-10-27 01:41:11,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:11,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043517277] [2020-10-27 01:41:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:11,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:12,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:12,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:41:12,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:12,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-27 01:41:12,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:41:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:41:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:12,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:12,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:12,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:12,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:12,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:12,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:41:12,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:41:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:12,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043517277] [2020-10-27 01:41:12,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:12,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:41:12,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131812989] [2020-10-27 01:41:12,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:41:12,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:12,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:41:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:41:12,506 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2020-10-27 01:41:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:13,334 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-27 01:41:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:41:13,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 01:41:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:13,336 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:41:13,337 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:41:13,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:41:13,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:41:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:41:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:41:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 01:41:13,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-27 01:41:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:13,346 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 01:41:13,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:41:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 01:41:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:41:13,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:13,347 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:13,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:41:13,348 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1111184764, now seen corresponding path program 6 times [2020-10-27 01:41:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:13,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152720337] [2020-10-27 01:41:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:13,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:13,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:13,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:13,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:41:13,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:13,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-27 01:41:13,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:13,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:41:13,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:13,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:41:13,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:13,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:13,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:13,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:13,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:13,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:13,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:13,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:13,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:13,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:13,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:13,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152720337] [2020-10-27 01:41:13,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:13,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:41:13,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219206106] [2020-10-27 01:41:13,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:41:13,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:41:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:13,974 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 19 states. [2020-10-27 01:41:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:14,920 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-27 01:41:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:41:14,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 01:41:14,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:14,922 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:41:14,922 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:41:14,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:41:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:41:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:41:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:41:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-27 01:41:14,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-27 01:41:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:14,933 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-27 01:41:14,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:41:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-27 01:41:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:41:14,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:14,934 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:14,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:41:14,935 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:14,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1298966553, now seen corresponding path program 7 times [2020-10-27 01:41:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:14,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565900444] [2020-10-27 01:41:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:14,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:15,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:41:15,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:41:15,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:41:15,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:15,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:41:15,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:15,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:15,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:15,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:15,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:15,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:15,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:15,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:15,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565900444] [2020-10-27 01:41:15,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:15,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:41:15,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727719128] [2020-10-27 01:41:15,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:41:15,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:41:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:15,481 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 20 states. [2020-10-27 01:41:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:16,334 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-27 01:41:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:41:16,334 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-27 01:41:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:16,335 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:41:16,335 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:41:16,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:41:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:41:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:41:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:41:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 01:41:16,345 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-27 01:41:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:16,345 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 01:41:16,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:41:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 01:41:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:41:16,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:16,346 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:16,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:41:16,347 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1368639350, now seen corresponding path program 8 times [2020-10-27 01:41:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:16,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884164948] [2020-10-27 01:41:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:16,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:16,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:16,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:41:16,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:16,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 01:41:16,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:41:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:41:16,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:16,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:16,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:17,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:17,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:17,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:17,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:17,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:17,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:17,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:17,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:17,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884164948] [2020-10-27 01:41:17,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:17,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:41:17,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559529248] [2020-10-27 01:41:17,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:41:17,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:17,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:41:17,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:17,015 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2020-10-27 01:41:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:18,005 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-27 01:41:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:41:18,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 01:41:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:18,007 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:41:18,007 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:41:18,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:41:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:41:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:41:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:41:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 01:41:18,017 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-27 01:41:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:18,017 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 01:41:18,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:41:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 01:41:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:41:18,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:18,018 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:18,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:41:18,019 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 395279469, now seen corresponding path program 9 times [2020-10-27 01:41:18,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:18,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700703846] [2020-10-27 01:41:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:18,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:18,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:41:18,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:18,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:41:18,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:41:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:41:18,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:18,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:18,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:18,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:18,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:18,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:18,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:18,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:18,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700703846] [2020-10-27 01:41:18,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:18,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:41:18,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736522985] [2020-10-27 01:41:18,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:41:18,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:18,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:41:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:41:18,658 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 22 states. [2020-10-27 01:41:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:19,646 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-27 01:41:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:41:19,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-27 01:41:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:19,649 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:41:19,649 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:41:19,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:41:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:41:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:41:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:41:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 01:41:19,658 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-27 01:41:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:19,659 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 01:41:19,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:41:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 01:41:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:41:19,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:19,660 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:19,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:41:19,660 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash -990817392, now seen corresponding path program 10 times [2020-10-27 01:41:19,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:19,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124208966] [2020-10-27 01:41:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:19,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:41:20,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 01:41:20,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:41:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:41:20,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:20,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:20,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:20,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:20,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:20,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:20,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:20,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124208966] [2020-10-27 01:41:20,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:20,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:41:20,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873917333] [2020-10-27 01:41:20,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:41:20,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:41:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:41:20,306 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 23 states. [2020-10-27 01:41:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:21,388 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-27 01:41:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:41:21,388 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 01:41:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:21,389 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:41:21,389 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:41:21,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:41:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:41:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:41:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:41:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 01:41:21,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-27 01:41:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:21,398 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 01:41:21,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:41:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 01:41:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:41:21,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:21,399 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:21,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:41:21,400 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1590039053, now seen corresponding path program 11 times [2020-10-27 01:41:21,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:21,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112973955] [2020-10-27 01:41:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:21,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:21,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:41:21,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:21,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-27 01:41:21,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:41:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:41:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:22,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:22,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:22,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:22,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:22,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:22,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112973955] [2020-10-27 01:41:22,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:22,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:41:22,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544376824] [2020-10-27 01:41:22,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:41:22,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:22,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:41:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:41:22,123 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 24 states. [2020-10-27 01:41:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:23,252 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-27 01:41:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:41:23,252 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-27 01:41:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:23,253 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:41:23,254 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:41:23,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:41:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:41:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:41:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:41:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-27 01:41:23,265 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-27 01:41:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:23,265 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-27 01:41:23,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:41:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-27 01:41:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:41:23,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:23,267 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:23,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:41:23,267 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:23,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1916437610, now seen corresponding path program 12 times [2020-10-27 01:41:23,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:23,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485519842] [2020-10-27 01:41:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:23,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:41:23,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:23,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-27 01:41:23,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:23,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:41:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:41:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:24,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:24,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:24,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:24,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:24,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:41:24,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:24,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:24,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485519842] [2020-10-27 01:41:24,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:24,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:41:24,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857273818] [2020-10-27 01:41:24,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:41:24,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:24,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:41:24,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:41:24,079 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 25 states. [2020-10-27 01:41:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:25,352 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 01:41:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:41:25,352 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-27 01:41:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:25,353 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:41:25,353 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:41:25,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:41:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:41:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:41:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:41:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 01:41:25,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-27 01:41:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:25,369 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 01:41:25,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:41:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 01:41:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:41:25,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:25,372 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:25,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:41:25,372 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2052838279, now seen corresponding path program 13 times [2020-10-27 01:41:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:25,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021091512] [2020-10-27 01:41:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:25,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:25,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:41:25,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:25,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-27 01:41:25,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:41:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:41:25,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:26,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:26,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:26,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:26,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:26,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:41:26,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:26,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:26,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021091512] [2020-10-27 01:41:26,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:26,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:41:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575763993] [2020-10-27 01:41:26,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:41:26,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:41:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:41:26,163 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 26 states. [2020-10-27 01:41:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:27,374 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-27 01:41:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:41:27,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 01:41:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:27,376 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:41:27,376 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:41:27,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:41:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:41:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:41:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:41:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-27 01:41:27,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-27 01:41:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:27,386 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-27 01:41:27,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:41:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-27 01:41:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:41:27,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:27,387 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:27,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:41:27,387 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:27,388 INFO L82 PathProgramCache]: Analyzing trace with hash 10104988, now seen corresponding path program 14 times [2020-10-27 01:41:27,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:27,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308069308] [2020-10-27 01:41:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:27,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:41:27,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:27,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-27 01:41:27,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:41:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:41:27,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:28,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:28,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:28,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:28,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:28,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:41:28,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:28,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:28,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308069308] [2020-10-27 01:41:28,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:28,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:41:28,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624324135] [2020-10-27 01:41:28,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:41:28,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:28,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:41:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:41:28,212 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 27 states. [2020-10-27 01:41:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:29,619 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-27 01:41:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:41:29,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 01:41:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:29,620 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:41:29,620 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:41:29,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:41:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:41:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:41:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:41:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 01:41:29,630 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-27 01:41:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:29,631 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 01:41:29,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:41:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 01:41:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:41:29,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:29,632 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:29,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:41:29,632 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1776306177, now seen corresponding path program 15 times [2020-10-27 01:41:29,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:29,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740882912] [2020-10-27 01:41:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:30,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:30,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:41:30,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:30,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-27 01:41:30,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:41:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:41:30,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:30,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:30,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:30,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:30,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:30,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:30,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:30,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:30,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:30,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:30,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:30,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740882912] [2020-10-27 01:41:30,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:30,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:41:30,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78743736] [2020-10-27 01:41:30,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:41:30,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:30,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:41:30,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:41:30,522 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 28 states. [2020-10-27 01:41:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:32,011 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-27 01:41:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:41:32,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-27 01:41:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:32,016 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:41:32,016 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:41:32,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:41:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:41:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 01:41:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:41:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 01:41:32,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-27 01:41:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:32,023 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 01:41:32,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:41:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 01:41:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:41:32,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:32,024 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:32,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:41:32,025 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash -530517342, now seen corresponding path program 16 times [2020-10-27 01:41:32,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:32,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298939738] [2020-10-27 01:41:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:32,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:32,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:41:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-27 01:41:32,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:41:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:41:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:33,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:33,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:33,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:33,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:33,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:33,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:33,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:33,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:33,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298939738] [2020-10-27 01:41:33,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:33,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:41:33,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226445610] [2020-10-27 01:41:33,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:41:33,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:41:33,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:41:33,030 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 29 states. [2020-10-27 01:41:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:34,526 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-27 01:41:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:41:34,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 01:41:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:34,528 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:41:34,528 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:41:34,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:41:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:41:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 01:41:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:41:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-27 01:41:34,536 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-27 01:41:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:34,537 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-27 01:41:34,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:41:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-27 01:41:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:41:34,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:34,538 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:34,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:41:34,538 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1623322491, now seen corresponding path program 17 times [2020-10-27 01:41:34,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:34,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152741294] [2020-10-27 01:41:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:34,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:35,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:41:35,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:35,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-27 01:41:35,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:41:35,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:35,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:41:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:35,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:35,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:35,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:35,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:35,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:35,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:35,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:35,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:35,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152741294] [2020-10-27 01:41:35,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:35,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:41:35,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432157798] [2020-10-27 01:41:35,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:41:35,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:41:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:41:35,635 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 30 states. [2020-10-27 01:41:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:37,304 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-27 01:41:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:41:37,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-27 01:41:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:37,306 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:41:37,306 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:41:37,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:41:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:41:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:41:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:41:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 01:41:37,315 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-27 01:41:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:37,316 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 01:41:37,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:41:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 01:41:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:41:37,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:37,317 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:37,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:41:37,317 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash 457916840, now seen corresponding path program 18 times [2020-10-27 01:41:37,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:37,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047820098] [2020-10-27 01:41:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:37,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:37,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:37,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:37,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:41:37,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-27 01:41:37,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:41:37,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:37,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:41:37,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:38,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:38,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:38,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:38,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:38,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:38,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:38,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:38,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047820098] [2020-10-27 01:41:38,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:38,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:41:38,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506840714] [2020-10-27 01:41:38,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:41:38,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:41:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:41:38,410 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 31 states. [2020-10-27 01:41:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:40,149 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-27 01:41:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:41:40,150 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 01:41:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:40,151 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:41:40,151 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:41:40,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:41:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:41:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 01:41:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:41:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-27 01:41:40,159 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-27 01:41:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:40,159 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-27 01:41:40,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:41:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-27 01:41:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:41:40,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:40,160 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:40,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:41:40,160 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:40,161 INFO L82 PathProgramCache]: Analyzing trace with hash -925846005, now seen corresponding path program 19 times [2020-10-27 01:41:40,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:40,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131766388] [2020-10-27 01:41:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:40,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:40,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:40,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:40,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:41:40,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 01:41:40,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:41:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:41:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:41,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:41,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:41,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:41,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:41,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:41,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:41,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:41,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:41,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131766388] [2020-10-27 01:41:41,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:41,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:41:41,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004839173] [2020-10-27 01:41:41,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:41:41,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:41,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:41:41,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:41:41,322 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 32 states. [2020-10-27 01:41:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:43,103 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-27 01:41:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:41:43,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-27 01:41:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:43,105 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:41:43,105 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:41:43,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:41:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:41:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 01:41:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:41:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-27 01:41:43,114 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-27 01:41:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:43,114 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-27 01:41:43,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:41:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-27 01:41:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:41:43,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:43,115 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:43,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:41:43,115 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:43,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:43,116 INFO L82 PathProgramCache]: Analyzing trace with hash 717921710, now seen corresponding path program 20 times [2020-10-27 01:41:43,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:43,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332131297] [2020-10-27 01:41:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:43,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:43,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:41:43,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:43,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 01:41:43,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:41:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:41:43,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:44,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:44,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:44,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:44,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:44,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:44,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:44,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:44,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332131297] [2020-10-27 01:41:44,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:44,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:41:44,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703738963] [2020-10-27 01:41:44,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:41:44,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:41:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:41:44,134 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 33 states. [2020-10-27 01:41:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:46,034 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-27 01:41:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:41:46,035 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 01:41:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:46,037 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:41:46,037 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:41:46,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:41:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:41:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:41:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:41:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 01:41:46,045 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-27 01:41:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:46,046 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 01:41:46,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:41:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 01:41:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:41:46,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:46,047 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:46,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:41:46,047 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash -169269103, now seen corresponding path program 21 times [2020-10-27 01:41:46,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:46,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551700146] [2020-10-27 01:41:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:41:46,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:47,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:47,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:47,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:47,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:47,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:47,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:47,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:47,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:47,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:47,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:47,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551700146] [2020-10-27 01:41:47,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:47,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:41:47,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152571887] [2020-10-27 01:41:47,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:41:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:41:47,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:41:47,115 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 34 states. [2020-10-27 01:41:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:49,117 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-27 01:41:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:41:49,118 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-27 01:41:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:49,120 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:41:49,120 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:41:49,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:41:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:41:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-27 01:41:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:41:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-27 01:41:49,129 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-27 01:41:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:49,129 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-27 01:41:49,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:41:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-27 01:41:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:41:49,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:49,130 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:49,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:41:49,131 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1938851508, now seen corresponding path program 22 times [2020-10-27 01:41:49,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:49,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234549118] [2020-10-27 01:41:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:49,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:41:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:50,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:50,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:50,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:50,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:50,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:50,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:50,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:50,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:50,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:50,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:50,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234549118] [2020-10-27 01:41:50,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:50,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:41:50,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878291174] [2020-10-27 01:41:50,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:41:50,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:41:50,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:41:50,263 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 35 states. [2020-10-27 01:41:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:52,339 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-27 01:41:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:41:52,340 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 01:41:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:52,341 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:41:52,341 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:41:52,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:41:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:41:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-27 01:41:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:41:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 01:41:52,349 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-27 01:41:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:52,350 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 01:41:52,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:41:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 01:41:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:41:52,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:52,350 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:52,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:41:52,351 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:52,351 INFO L82 PathProgramCache]: Analyzing trace with hash 618194967, now seen corresponding path program 23 times [2020-10-27 01:41:52,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:52,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493546135] [2020-10-27 01:41:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:52,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:41:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:53,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:53,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:53,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:53,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:53,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:53,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:53,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:53,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:53,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:53,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493546135] [2020-10-27 01:41:53,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:53,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:41:53,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171411763] [2020-10-27 01:41:53,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:41:53,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:53,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:41:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:41:53,512 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 36 states. [2020-10-27 01:41:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:55,670 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-27 01:41:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:41:55,671 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-27 01:41:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:55,672 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:41:55,672 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:41:55,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:41:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:41:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 01:41:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:41:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-27 01:41:55,681 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-27 01:41:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:55,681 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-27 01:41:55,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:41:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-27 01:41:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:41:55,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:55,682 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:55,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:41:55,683 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1517388614, now seen corresponding path program 24 times [2020-10-27 01:41:55,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:55,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416322749] [2020-10-27 01:41:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:55,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:56,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:41:56,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:56,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 01:41:56,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:41:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 01:41:56,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:56,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:56,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416322749] [2020-10-27 01:41:56,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:56,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:41:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322382396] [2020-10-27 01:41:56,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:41:56,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:41:56,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:41:56,859 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 37 states. [2020-10-27 01:41:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:59,173 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-27 01:41:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:41:59,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 01:41:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:59,174 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:41:59,175 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:41:59,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:41:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:41:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 01:41:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:41:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 01:41:59,182 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-27 01:41:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:59,183 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 01:41:59,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:41:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 01:41:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:41:59,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:59,184 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:59,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:41:59,184 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash -818842467, now seen corresponding path program 25 times [2020-10-27 01:41:59,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:59,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233221013] [2020-10-27 01:41:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:59,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:41:59,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:59,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-27 01:41:59,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:59,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:41:59,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:59,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 01:41:59,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:00,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:00,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:00,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:00,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:00,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:00,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:00,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:00,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:00,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:00,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:00,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:00,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233221013] [2020-10-27 01:42:00,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:00,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:42:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327325325] [2020-10-27 01:42:00,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:42:00,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:42:00,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:42:00,452 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 38 states. [2020-10-27 01:42:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:02,809 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-27 01:42:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:42:02,810 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-27 01:42:02,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:02,811 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:42:02,811 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:42:02,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:42:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:42:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 01:42:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:42:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-27 01:42:02,819 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-27 01:42:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:02,820 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-27 01:42:02,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:42:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-27 01:42:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:42:02,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:02,821 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:02,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:42:02,821 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:02,822 INFO L82 PathProgramCache]: Analyzing trace with hash 469106624, now seen corresponding path program 26 times [2020-10-27 01:42:02,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:02,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731615566] [2020-10-27 01:42:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:02,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:03,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:42:03,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:03,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-27 01:42:03,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:42:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 01:42:03,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:04,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:04,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:04,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:04,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:04,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:04,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:04,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:04,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:04,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:04,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731615566] [2020-10-27 01:42:04,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:04,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:42:04,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987861668] [2020-10-27 01:42:04,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:42:04,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:42:04,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:42:04,191 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 39 states. [2020-10-27 01:42:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:06,535 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-27 01:42:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:42:06,536 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 01:42:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:06,537 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:42:06,537 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:42:06,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:42:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:42:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 01:42:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:42:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-27 01:42:06,547 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-27 01:42:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:06,547 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-27 01:42:06,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:42:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-27 01:42:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:42:06,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:06,548 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:06,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:42:06,548 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1237601827, now seen corresponding path program 27 times [2020-10-27 01:42:06,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:06,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379440949] [2020-10-27 01:42:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:06,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:07,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:42:07,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:07,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-27 01:42:07,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:07,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:42:07,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:07,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 01:42:07,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:07,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:07,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:07,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379440949] [2020-10-27 01:42:07,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:07,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:42:07,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145523101] [2020-10-27 01:42:07,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:42:07,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:42:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:42:07,962 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 40 states. [2020-10-27 01:42:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:10,446 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-27 01:42:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:42:10,446 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-27 01:42:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:10,447 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:42:10,448 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:42:10,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:42:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:42:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-27 01:42:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:42:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 01:42:10,455 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-27 01:42:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:10,455 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 01:42:10,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:42:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 01:42:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:42:10,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:10,456 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:10,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:42:10,456 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1027116998, now seen corresponding path program 28 times [2020-10-27 01:42:10,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:10,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491762179] [2020-10-27 01:42:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:10,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 01:42:10,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:11,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:11,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:11,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:11,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:11,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:11,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:11,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:11,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:11,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:11,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:11,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491762179] [2020-10-27 01:42:11,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:11,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:42:11,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345914452] [2020-10-27 01:42:11,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:42:11,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:42:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:42:11,870 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 41 states. [2020-10-27 01:42:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:14,727 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-27 01:42:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:42:14,728 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 01:42:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:14,730 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:42:14,730 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:42:14,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:42:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:42:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-27 01:42:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:42:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-27 01:42:14,739 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-27 01:42:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:14,739 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-27 01:42:14,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:42:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-27 01:42:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:42:14,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:14,740 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:14,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:42:14,741 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:14,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash 614659241, now seen corresponding path program 29 times [2020-10-27 01:42:14,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:14,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73592498] [2020-10-27 01:42:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:14,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:15,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:15,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:42:15,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-27 01:42:15,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:42:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 01:42:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:16,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:16,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:16,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:16,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:16,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:16,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:16,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:16,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:16,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:16,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:16,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73592498] [2020-10-27 01:42:16,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:16,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:42:16,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093831032] [2020-10-27 01:42:16,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:42:16,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:42:16,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:42:16,262 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 42 states. [2020-10-27 01:42:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:19,054 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-27 01:42:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:42:19,055 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-27 01:42:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:19,056 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:42:19,057 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:42:19,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:42:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:42:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 01:42:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:42:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-27 01:42:19,066 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-27 01:42:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:19,066 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-27 01:42:19,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:42:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-27 01:42:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:42:19,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:19,067 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:19,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:42:19,067 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:19,068 INFO L82 PathProgramCache]: Analyzing trace with hash -620254004, now seen corresponding path program 30 times [2020-10-27 01:42:19,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:19,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154125623] [2020-10-27 01:42:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:19,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:19,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:19,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:42:19,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:19,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-27 01:42:19,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:42:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 01:42:19,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:20,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:20,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:20,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:20,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:20,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:20,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154125623] [2020-10-27 01:42:20,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:20,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:42:20,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738738147] [2020-10-27 01:42:20,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:42:20,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:20,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:42:20,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:42:20,551 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 43 states. [2020-10-27 01:42:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:23,440 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-27 01:42:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:42:23,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 01:42:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:23,442 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:42:23,442 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:42:23,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:42:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:42:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-27 01:42:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:42:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-27 01:42:23,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-27 01:42:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:23,450 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-27 01:42:23,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:42:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-27 01:42:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:42:23,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:23,451 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:23,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:42:23,451 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1960908753, now seen corresponding path program 31 times [2020-10-27 01:42:23,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:23,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67834071] [2020-10-27 01:42:23,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:23,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:23,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 01:42:24,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:25,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:25,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:25,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:25,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:25,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:25,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:25,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:25,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:25,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:25,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:25,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:25,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67834071] [2020-10-27 01:42:25,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:25,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:42:25,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405718160] [2020-10-27 01:42:25,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:42:25,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:42:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:42:25,127 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 44 states. [2020-10-27 01:42:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:28,043 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-27 01:42:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:42:28,043 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-27 01:42:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:28,044 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:42:28,045 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:42:28,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:42:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:42:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 01:42:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:42:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-27 01:42:28,053 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-27 01:42:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:28,054 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-27 01:42:28,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:42:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-27 01:42:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 01:42:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:28,055 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:28,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:42:28,055 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1839933742, now seen corresponding path program 32 times [2020-10-27 01:42:28,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:28,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544743416] [2020-10-27 01:42:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 01:42:28,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:29,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:29,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:29,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:29,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:29,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:29,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544743416] [2020-10-27 01:42:29,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:29,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:42:29,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919785582] [2020-10-27 01:42:29,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:42:29,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:29,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:42:29,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:42:29,914 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 45 states. [2020-10-27 01:42:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:32,866 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-27 01:42:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:42:32,866 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-27 01:42:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:32,868 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:42:32,868 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:42:32,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:42:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:42:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:42:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:42:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 01:42:32,878 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-27 01:42:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:32,878 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 01:42:32,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:42:32,878 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 01:42:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:42:32,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:32,879 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:32,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:42:32,880 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1547065163, now seen corresponding path program 33 times [2020-10-27 01:42:32,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:32,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544561381] [2020-10-27 01:42:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:32,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 01:42:33,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:34,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:34,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:34,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:34,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:34,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:34,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:34,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:34,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:34,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544561381] [2020-10-27 01:42:34,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:34,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:42:34,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474701590] [2020-10-27 01:42:34,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:42:34,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:42:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:42:34,766 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 46 states. [2020-10-27 01:42:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:37,966 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-27 01:42:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:42:37,966 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-27 01:42:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:37,968 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:42:37,968 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:42:37,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:42:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:42:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 01:42:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:42:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-27 01:42:37,977 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-27 01:42:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:37,977 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-27 01:42:37,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:42:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-27 01:42:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 01:42:37,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:37,978 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:37,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:42:37,978 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:37,979 INFO L82 PathProgramCache]: Analyzing trace with hash 726765016, now seen corresponding path program 34 times [2020-10-27 01:42:37,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:37,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972910569] [2020-10-27 01:42:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:38,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:38,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:42:38,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:39,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:39,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:39,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:39,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:39,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:39,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:39,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:39,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972910569] [2020-10-27 01:42:39,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:39,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:42:39,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214318805] [2020-10-27 01:42:39,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:42:39,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:42:39,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:42:39,873 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 47 states. [2020-10-27 01:42:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:43,203 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-27 01:42:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:42:43,204 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-27 01:42:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:43,205 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:42:43,205 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:42:43,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:42:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:42:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-27 01:42:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:42:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-27 01:42:43,215 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-27 01:42:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:43,215 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-27 01:42:43,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:42:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-27 01:42:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:42:43,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:43,216 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:43,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:42:43,217 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -260786629, now seen corresponding path program 35 times [2020-10-27 01:42:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:43,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062843889] [2020-10-27 01:42:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:43,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:43,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 01:42:43,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:43,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-27 01:42:43,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:43,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:42:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 01:42:43,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:45,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:45,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:45,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:45,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:45,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:45,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:45,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:45,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:45,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062843889] [2020-10-27 01:42:45,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:45,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:42:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824807071] [2020-10-27 01:42:45,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:42:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:42:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:42:45,093 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 48 states. [2020-10-27 01:42:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:48,434 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-27 01:42:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:42:48,435 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-27 01:42:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:48,436 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:42:48,436 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:42:48,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:42:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:42:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 01:42:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:42:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-27 01:42:48,446 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-27 01:42:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:48,447 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-27 01:42:48,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:42:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-27 01:42:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:42:48,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:48,448 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:48,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:42:48,448 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash -110145058, now seen corresponding path program 36 times [2020-10-27 01:42:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:48,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483141704] [2020-10-27 01:42:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:48,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:49,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 01:42:49,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:50,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:50,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:50,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:50,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:50,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483141704] [2020-10-27 01:42:50,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:50,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:42:50,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757745525] [2020-10-27 01:42:50,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:42:50,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:42:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:42:50,544 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 49 states. [2020-10-27 01:42:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:54,066 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-27 01:42:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:42:54,066 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-27 01:42:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:54,068 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:42:54,068 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:42:54,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:42:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:42:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-27 01:42:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:42:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-27 01:42:54,077 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-27 01:42:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:54,077 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-27 01:42:54,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:42:54,078 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-27 01:42:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:42:54,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:54,078 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:54,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:42:54,079 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1372483391, now seen corresponding path program 37 times [2020-10-27 01:42:54,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:54,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389565370] [2020-10-27 01:42:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:54,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:54,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:54,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:42:54,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-27 01:42:54,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:42:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 01:42:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:56,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:56,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:56,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:56,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:56,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:56,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:56,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:56,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389565370] [2020-10-27 01:42:56,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:56,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:42:56,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859151459] [2020-10-27 01:42:56,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:42:56,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:42:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:42:56,238 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 50 states. [2020-10-27 01:42:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:59,912 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-10-27 01:42:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:42:59,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-27 01:42:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:59,915 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:42:59,915 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:42:59,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:42:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:42:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-27 01:42:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:42:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 01:42:59,926 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-27 01:42:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:59,926 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 01:42:59,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:42:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 01:42:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 01:42:59,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:59,927 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:59,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:42:59,928 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash 996123364, now seen corresponding path program 38 times [2020-10-27 01:42:59,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:59,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754262965] [2020-10-27 01:42:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:59,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:00,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 01:43:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:02,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:02,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:02,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:02,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:02,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:02,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754262965] [2020-10-27 01:43:02,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:02,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:43:02,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253318277] [2020-10-27 01:43:02,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:43:02,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:43:02,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:43:02,158 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 51 states. [2020-10-27 01:43:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:05,881 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-27 01:43:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:43:05,881 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-27 01:43:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:05,883 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:43:05,883 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:43:05,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:43:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:43:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-27 01:43:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:43:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-27 01:43:05,891 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2020-10-27 01:43:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:05,891 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-27 01:43:05,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:43:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-27 01:43:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:43:05,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:05,892 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:05,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:43:05,892 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash 894548039, now seen corresponding path program 39 times [2020-10-27 01:43:05,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:05,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587526845] [2020-10-27 01:43:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:05,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:06,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 740 [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 01:43:06,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:08,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:08,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:08,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:08,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:08,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:08,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:08,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:08,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587526845] [2020-10-27 01:43:08,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:08,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:43:08,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137020741] [2020-10-27 01:43:08,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:43:08,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:43:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:43:08,236 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 52 states. [2020-10-27 01:43:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:12,178 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2020-10-27 01:43:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:43:12,179 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-27 01:43:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:12,180 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:43:12,180 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:43:12,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:43:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:43:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-27 01:43:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:43:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-27 01:43:12,187 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2020-10-27 01:43:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:12,188 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-27 01:43:12,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:43:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-27 01:43:12,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 01:43:12,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:12,188 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:12,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:43:12,189 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2064908522, now seen corresponding path program 40 times [2020-10-27 01:43:12,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:12,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104694214] [2020-10-27 01:43:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:12,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:12,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:12,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 01:43:12,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:14,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:14,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:14,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:14,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:14,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:14,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:14,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:14,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:14,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104694214] [2020-10-27 01:43:14,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:14,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:43:14,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009046464] [2020-10-27 01:43:14,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:43:14,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:14,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:43:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:43:14,639 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 53 states. [2020-10-27 01:43:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:18,771 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-10-27 01:43:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:43:18,772 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-27 01:43:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:18,773 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:43:18,773 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:43:18,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:43:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:43:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-27 01:43:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:43:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-27 01:43:18,787 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2020-10-27 01:43:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:18,787 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-27 01:43:18,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:43:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-27 01:43:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 01:43:18,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:18,788 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:18,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:43:18,788 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1499901133, now seen corresponding path program 41 times [2020-10-27 01:43:18,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:18,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029466703] [2020-10-27 01:43:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:18,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:18,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:18,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 01:43:18,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 01:43:18,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:43:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:43:18,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:18,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:18,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:18,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:18,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:18,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:18,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:18,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:18,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:19,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029466703] [2020-10-27 01:43:19,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:19,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:43:19,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630401530] [2020-10-27 01:43:19,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:43:19,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:43:19,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:43:19,012 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 5 states. [2020-10-27 01:43:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:19,156 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-10-27 01:43:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:43:19,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-27 01:43:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:19,157 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:43:19,157 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:43:19,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:43:19,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:43:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-27 01:43:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 01:43:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-10-27 01:43:19,166 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2020-10-27 01:43:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:19,166 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-10-27 01:43:19,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:43:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-10-27 01:43:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 01:43:19,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:19,167 INFO L422 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:19,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:43:19,167 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:19,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1938776653, now seen corresponding path program 42 times [2020-10-27 01:43:19,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:19,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366881150] [2020-10-27 01:43:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:19,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:19,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:19,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 01:43:19,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:19,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 01:43:19,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:43:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:43:19,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:19,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:19,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:19,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:19,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:19,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:19,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:19,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:19,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 205 proven. 4 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:19,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366881150] [2020-10-27 01:43:19,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:19,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:43:19,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684530945] [2020-10-27 01:43:19,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:43:19,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:43:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:43:19,339 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 6 states. [2020-10-27 01:43:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:19,533 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-10-27 01:43:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:43:19,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-27 01:43:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:19,535 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:43:19,536 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:43:19,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:43:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:43:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-27 01:43:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:43:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-27 01:43:19,546 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2020-10-27 01:43:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:19,547 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-27 01:43:19,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:43:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-27 01:43:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 01:43:19,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:19,548 INFO L422 BasicCegarLoop]: trace histogram [44, 41, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:19,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:43:19,548 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash 616688921, now seen corresponding path program 43 times [2020-10-27 01:43:19,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:19,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932975915] [2020-10-27 01:43:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:19,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:19,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:19,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:43:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 01:43:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:43:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:43:19,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:19,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:19,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:19,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:19,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:19,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:19,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:19,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:19,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:19,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:19,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:19,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 287 proven. 9 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:19,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932975915] [2020-10-27 01:43:19,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:19,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:43:19,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709627964] [2020-10-27 01:43:19,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:43:19,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:43:19,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:43:19,793 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 7 states. [2020-10-27 01:43:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:20,031 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-10-27 01:43:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:43:20,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2020-10-27 01:43:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:20,033 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:43:20,034 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:43:20,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:43:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:43:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-27 01:43:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:43:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-27 01:43:20,045 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 116 [2020-10-27 01:43:20,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:20,045 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-27 01:43:20,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:43:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-27 01:43:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 01:43:20,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:20,047 INFO L422 BasicCegarLoop]: trace histogram [45, 41, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:20,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:43:20,047 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:20,048 INFO L82 PathProgramCache]: Analyzing trace with hash -302187777, now seen corresponding path program 44 times [2020-10-27 01:43:20,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:20,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358919918] [2020-10-27 01:43:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:20,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:20,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:20,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 01:43:20,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:20,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 01:43:20,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:43:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:43:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:20,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:20,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:20,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:20,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:20,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 369 proven. 16 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:20,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358919918] [2020-10-27 01:43:20,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:20,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:43:20,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772412354] [2020-10-27 01:43:20,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:43:20,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:20,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:43:20,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:43:20,419 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 8 states. [2020-10-27 01:43:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:20,714 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-27 01:43:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:43:20,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2020-10-27 01:43:20,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:20,719 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:43:20,719 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:43:20,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:43:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:43:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-27 01:43:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:43:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-27 01:43:20,733 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 118 [2020-10-27 01:43:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:20,734 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-27 01:43:20,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:43:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-27 01:43:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:43:20,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:20,735 INFO L422 BasicCegarLoop]: trace histogram [46, 41, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:20,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:43:20,736 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1420568421, now seen corresponding path program 45 times [2020-10-27 01:43:20,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:20,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387213932] [2020-10-27 01:43:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:20,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:21,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:21,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 01:43:21,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:21,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 01:43:21,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:43:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:43:21,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:21,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:21,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:21,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:21,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:43:21,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 451 proven. 25 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:21,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387213932] [2020-10-27 01:43:21,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:21,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:43:21,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058828386] [2020-10-27 01:43:21,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:43:21,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:43:21,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:43:21,121 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 9 states. [2020-10-27 01:43:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:21,459 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2020-10-27 01:43:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:43:21,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 120 [2020-10-27 01:43:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:21,461 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:43:21,461 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:43:21,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:43:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:43:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-27 01:43:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 01:43:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2020-10-27 01:43:21,471 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 120 [2020-10-27 01:43:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:21,471 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2020-10-27 01:43:21,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:43:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2020-10-27 01:43:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 01:43:21,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:21,473 INFO L422 BasicCegarLoop]: trace histogram [47, 41, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:21,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:43:21,473 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash -868101557, now seen corresponding path program 46 times [2020-10-27 01:43:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:21,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707674501] [2020-10-27 01:43:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:21,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:43:21,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:21,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:21,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:21,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:21,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:21,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:21,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:21,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:21,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:21,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:21,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 533 proven. 36 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:21,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707674501] [2020-10-27 01:43:21,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:21,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:43:21,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588956640] [2020-10-27 01:43:21,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:43:21,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:43:21,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:43:21,772 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 10 states. [2020-10-27 01:43:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:22,143 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-27 01:43:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:43:22,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 122 [2020-10-27 01:43:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:22,145 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:43:22,145 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:43:22,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:43:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:43:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-27 01:43:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:43:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2020-10-27 01:43:22,156 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 122 [2020-10-27 01:43:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:22,157 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2020-10-27 01:43:22,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:43:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2020-10-27 01:43:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 01:43:22,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:22,158 INFO L422 BasicCegarLoop]: trace histogram [48, 41, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:22,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:43:22,158 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:22,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1256694863, now seen corresponding path program 47 times [2020-10-27 01:43:22,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:22,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683060750] [2020-10-27 01:43:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:22,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:22,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 01:43:22,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:22,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-27 01:43:22,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:22,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:43:22,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:22,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:43:22,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:22,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:22,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:22,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:22,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:43:22,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:22,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:22,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:22,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:22,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 615 proven. 49 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:22,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683060750] [2020-10-27 01:43:22,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:22,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:43:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015027723] [2020-10-27 01:43:22,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:43:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:43:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:43:22,667 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand 11 states. [2020-10-27 01:43:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:23,094 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2020-10-27 01:43:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:43:23,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2020-10-27 01:43:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:23,096 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:43:23,096 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:43:23,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:43:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:43:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-27 01:43:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:43:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 135 transitions. [2020-10-27 01:43:23,107 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 135 transitions. Word has length 124 [2020-10-27 01:43:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:23,107 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 135 transitions. [2020-10-27 01:43:23,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:43:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 135 transitions. [2020-10-27 01:43:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 01:43:23,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:23,108 INFO L422 BasicCegarLoop]: trace histogram [49, 41, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:23,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:43:23,108 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1032707177, now seen corresponding path program 48 times [2020-10-27 01:43:23,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:23,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349313765] [2020-10-27 01:43:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:23,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:23,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:23,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 01:43:23,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:23,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-27 01:43:23,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:23,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:43:23,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:23,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:43:23,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:23,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:23,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:23,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:23,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:23,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:23,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:23,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:23,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:23,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:23,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 697 proven. 64 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:23,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349313765] [2020-10-27 01:43:23,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:23,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:43:23,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489980401] [2020-10-27 01:43:23,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:43:23,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:23,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:43:23,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:43:23,596 INFO L87 Difference]: Start difference. First operand 127 states and 135 transitions. Second operand 12 states. [2020-10-27 01:43:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:24,087 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2020-10-27 01:43:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:43:24,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-10-27 01:43:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:24,089 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:43:24,089 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:43:24,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:43:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:43:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-27 01:43:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:43:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2020-10-27 01:43:24,100 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 126 [2020-10-27 01:43:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:24,101 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2020-10-27 01:43:24,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:43:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2020-10-27 01:43:24,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 01:43:24,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:24,102 INFO L422 BasicCegarLoop]: trace histogram [50, 41, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:24,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:43:24,102 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -528905731, now seen corresponding path program 49 times [2020-10-27 01:43:24,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:24,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988540718] [2020-10-27 01:43:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:24,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 01:43:24,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-27 01:43:24,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:43:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:43:24,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:24,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:24,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:24,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:24,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:24,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:24,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:24,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:24,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:24,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 779 proven. 81 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:24,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988540718] [2020-10-27 01:43:24,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:24,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:43:24,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594581152] [2020-10-27 01:43:24,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:43:24,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:43:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:43:24,590 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 13 states. [2020-10-27 01:43:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:25,117 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2020-10-27 01:43:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:43:25,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 128 [2020-10-27 01:43:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:25,119 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:43:25,119 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:43:25,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:43:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:43:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-27 01:43:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:43:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2020-10-27 01:43:25,129 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 128 [2020-10-27 01:43:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:25,130 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2020-10-27 01:43:25,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:43:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2020-10-27 01:43:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 01:43:25,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:25,131 INFO L422 BasicCegarLoop]: trace histogram [51, 41, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:25,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:43:25,131 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1707020573, now seen corresponding path program 50 times [2020-10-27 01:43:25,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:25,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441492871] [2020-10-27 01:43:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:25,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:25,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 01:43:25,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:25,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-27 01:43:25,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:43:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:25,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:43:25,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:25,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:25,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:25,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:25,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:25,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:25,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:25,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:25,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:25,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 861 proven. 100 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:25,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441492871] [2020-10-27 01:43:25,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:25,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:43:25,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053024720] [2020-10-27 01:43:25,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:43:25,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:43:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:43:25,596 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand 14 states. [2020-10-27 01:43:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:26,176 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-10-27 01:43:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:43:26,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 130 [2020-10-27 01:43:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:26,178 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:43:26,178 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:43:26,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:43:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:43:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-27 01:43:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:43:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2020-10-27 01:43:26,188 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 130 [2020-10-27 01:43:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:26,189 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2020-10-27 01:43:26,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:43:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2020-10-27 01:43:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 01:43:26,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:26,190 INFO L422 BasicCegarLoop]: trace histogram [52, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:26,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:43:26,190 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:26,191 INFO L82 PathProgramCache]: Analyzing trace with hash -4017591, now seen corresponding path program 51 times [2020-10-27 01:43:26,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:26,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077820084] [2020-10-27 01:43:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:26,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:43:26,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:26,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:26,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:26,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:26,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:26,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:26,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:26,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:26,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 121 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:26,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077820084] [2020-10-27 01:43:26,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:26,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:43:26,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833143004] [2020-10-27 01:43:26,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:43:26,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:26,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:43:26,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:43:26,803 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand 15 states. [2020-10-27 01:43:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:27,496 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2020-10-27 01:43:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:43:27,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 132 [2020-10-27 01:43:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:27,499 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:43:27,499 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 01:43:27,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:43:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 01:43:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-27 01:43:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 01:43:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2020-10-27 01:43:27,508 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 132 [2020-10-27 01:43:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:27,509 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2020-10-27 01:43:27,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:43:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2020-10-27 01:43:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 01:43:27,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:27,510 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:27,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:43:27,510 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:27,511 INFO L82 PathProgramCache]: Analyzing trace with hash 199308335, now seen corresponding path program 52 times [2020-10-27 01:43:27,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:27,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471679529] [2020-10-27 01:43:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:27,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:27,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:43:27,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:28,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:28,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:28,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:28,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:28,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 144 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471679529] [2020-10-27 01:43:28,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:28,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:43:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656729726] [2020-10-27 01:43:28,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:43:28,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:43:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:43:28,124 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand 16 states. [2020-10-27 01:43:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:28,828 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2020-10-27 01:43:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:43:28,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 134 [2020-10-27 01:43:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:28,831 INFO L225 Difference]: With dead ends: 142 [2020-10-27 01:43:28,831 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 01:43:28,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:43:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 01:43:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-27 01:43:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:43:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2020-10-27 01:43:28,838 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 134 [2020-10-27 01:43:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:28,839 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2020-10-27 01:43:28,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:43:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2020-10-27 01:43:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 01:43:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:28,840 INFO L422 BasicCegarLoop]: trace histogram [54, 41, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:28,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:43:28,840 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1972972395, now seen corresponding path program 53 times [2020-10-27 01:43:28,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:28,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318602727] [2020-10-27 01:43:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:28,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:29,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:29,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 01:43:29,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:29,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-27 01:43:29,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:43:29,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:29,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:43:29,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:29,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:29,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:29,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:29,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:29,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:29,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:29,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1107 proven. 169 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:29,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318602727] [2020-10-27 01:43:29,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:29,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:43:29,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469016034] [2020-10-27 01:43:29,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:43:29,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:43:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:43:29,424 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand 17 states. [2020-10-27 01:43:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:30,198 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2020-10-27 01:43:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:43:30,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 136 [2020-10-27 01:43:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:30,200 INFO L225 Difference]: With dead ends: 144 [2020-10-27 01:43:30,200 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 01:43:30,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:43:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 01:43:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-27 01:43:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:43:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2020-10-27 01:43:30,216 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 136 [2020-10-27 01:43:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:30,216 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2020-10-27 01:43:30,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:43:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2020-10-27 01:43:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 01:43:30,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:30,217 INFO L422 BasicCegarLoop]: trace histogram [55, 41, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:30,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:43:30,217 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2114319227, now seen corresponding path program 54 times [2020-10-27 01:43:30,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:30,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460340719] [2020-10-27 01:43:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:30,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:43:30,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:30,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:30,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1189 proven. 196 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:30,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460340719] [2020-10-27 01:43:30,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:30,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:43:30,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963983755] [2020-10-27 01:43:30,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:43:30,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:30,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:43:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:43:30,857 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand 18 states. [2020-10-27 01:43:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:31,674 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-10-27 01:43:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:43:31,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 138 [2020-10-27 01:43:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:31,676 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:43:31,677 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:43:31,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:43:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:43:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-27 01:43:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 01:43:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2020-10-27 01:43:31,688 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 138 [2020-10-27 01:43:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:31,688 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2020-10-27 01:43:31,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:43:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2020-10-27 01:43:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 01:43:31,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:31,689 INFO L422 BasicCegarLoop]: trace histogram [56, 41, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:31,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:43:31,690 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash 106492129, now seen corresponding path program 55 times [2020-10-27 01:43:31,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:31,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795268549] [2020-10-27 01:43:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:32,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 01:43:32,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:32,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-27 01:43:32,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:32,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:43:32,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:32,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:43:32,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:32,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:32,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:32,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:32,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:32,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:32,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:32,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:32,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:32,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1271 proven. 225 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:32,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795268549] [2020-10-27 01:43:32,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:32,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:43:32,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158193857] [2020-10-27 01:43:32,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:43:32,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:32,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:43:32,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:43:32,558 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand 19 states. [2020-10-27 01:43:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:33,521 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2020-10-27 01:43:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:43:33,521 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 140 [2020-10-27 01:43:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:33,523 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:43:33,523 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 01:43:33,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:43:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 01:43:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-27 01:43:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:43:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-10-27 01:43:33,533 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 140 [2020-10-27 01:43:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:33,533 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-10-27 01:43:33,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:43:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-10-27 01:43:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-27 01:43:33,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:33,534 INFO L422 BasicCegarLoop]: trace histogram [57, 41, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:33,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:43:33,534 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash -975033145, now seen corresponding path program 56 times [2020-10-27 01:43:33,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:33,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192650751] [2020-10-27 01:43:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:43:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:34,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:34,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1353 proven. 256 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:34,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192650751] [2020-10-27 01:43:34,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:34,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:43:34,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857080862] [2020-10-27 01:43:34,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:43:34,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:43:34,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:43:34,376 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 20 states. [2020-10-27 01:43:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:35,362 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2020-10-27 01:43:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:43:35,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 142 [2020-10-27 01:43:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:35,364 INFO L225 Difference]: With dead ends: 150 [2020-10-27 01:43:35,364 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 01:43:35,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:43:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 01:43:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-27 01:43:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:43:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2020-10-27 01:43:35,375 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 142 [2020-10-27 01:43:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:35,376 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2020-10-27 01:43:35,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:43:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2020-10-27 01:43:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 01:43:35,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:35,377 INFO L422 BasicCegarLoop]: trace histogram [58, 41, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:35,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:43:35,377 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash -938735827, now seen corresponding path program 57 times [2020-10-27 01:43:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816477870] [2020-10-27 01:43:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:35,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:43:35,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:36,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:36,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:36,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:36,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:36,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:36,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:36,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:36,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:36,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:36,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1435 proven. 289 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:36,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816477870] [2020-10-27 01:43:36,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:36,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:43:36,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919932020] [2020-10-27 01:43:36,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:43:36,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:43:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:43:36,216 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand 21 states. [2020-10-27 01:43:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:37,262 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2020-10-27 01:43:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:43:37,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2020-10-27 01:43:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:37,264 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:43:37,264 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:43:37,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:43:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:43:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-27 01:43:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:43:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2020-10-27 01:43:37,275 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 144 [2020-10-27 01:43:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:37,276 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2020-10-27 01:43:37,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:43:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2020-10-27 01:43:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 01:43:37,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:37,277 INFO L422 BasicCegarLoop]: trace histogram [59, 41, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:37,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:43:37,277 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash -416751597, now seen corresponding path program 58 times [2020-10-27 01:43:37,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:37,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470776873] [2020-10-27 01:43:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:37,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:37,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:37,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 01:43:37,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:37,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 663 [2020-10-27 01:43:37,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:37,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:43:37,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:37,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:43:37,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:38,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:38,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:38,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:38,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:38,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:38,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:43:38,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:38,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:38,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:38,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:38,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1517 proven. 324 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:38,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470776873] [2020-10-27 01:43:38,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:38,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:43:38,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081001365] [2020-10-27 01:43:38,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:43:38,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:38,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:43:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:43:38,272 INFO L87 Difference]: Start difference. First operand 147 states and 165 transitions. Second operand 22 states. [2020-10-27 01:43:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:39,370 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2020-10-27 01:43:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:43:39,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 146 [2020-10-27 01:43:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:39,372 INFO L225 Difference]: With dead ends: 154 [2020-10-27 01:43:39,373 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 01:43:39,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:43:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 01:43:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-27 01:43:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:43:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 168 transitions. [2020-10-27 01:43:39,394 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 168 transitions. Word has length 146 [2020-10-27 01:43:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:39,394 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 168 transitions. [2020-10-27 01:43:39,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:43:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 168 transitions. [2020-10-27 01:43:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 01:43:39,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:39,396 INFO L422 BasicCegarLoop]: trace histogram [60, 41, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:39,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:43:39,396 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1301080199, now seen corresponding path program 59 times [2020-10-27 01:43:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:39,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143189608] [2020-10-27 01:43:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:39,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:39,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 01:43:39,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:39,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 01:43:39,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:39,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:43:39,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:39,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:43:39,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:40,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:40,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:40,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:40,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:40,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:40,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:40,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:40,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:40,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:40,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1599 proven. 361 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:40,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143189608] [2020-10-27 01:43:40,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:40,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:43:40,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731100418] [2020-10-27 01:43:40,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:43:40,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:43:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:43:40,356 INFO L87 Difference]: Start difference. First operand 149 states and 168 transitions. Second operand 23 states. [2020-10-27 01:43:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:41,612 INFO L93 Difference]: Finished difference Result 156 states and 177 transitions. [2020-10-27 01:43:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:43:41,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 148 [2020-10-27 01:43:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:41,614 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:43:41,614 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:43:41,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:43:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:43:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-27 01:43:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 01:43:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2020-10-27 01:43:41,626 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 148 [2020-10-27 01:43:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:41,626 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2020-10-27 01:43:41,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:43:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2020-10-27 01:43:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 01:43:41,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:41,627 INFO L422 BasicCegarLoop]: trace histogram [61, 41, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:41,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:43:41,628 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:41,628 INFO L82 PathProgramCache]: Analyzing trace with hash -737342113, now seen corresponding path program 60 times [2020-10-27 01:43:41,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:41,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591601211] [2020-10-27 01:43:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:42,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:42,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 01:43:42,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-27 01:43:42,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:43:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:42,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:43:42,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:42,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:42,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:42,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:42,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:42,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:42,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:42,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1681 proven. 400 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:42,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591601211] [2020-10-27 01:43:42,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:42,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:43:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658092155] [2020-10-27 01:43:42,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:43:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:43:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:43:42,799 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand 24 states. [2020-10-27 01:43:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:44,176 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-10-27 01:43:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:43:44,177 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 150 [2020-10-27 01:43:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:44,179 INFO L225 Difference]: With dead ends: 158 [2020-10-27 01:43:44,179 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 01:43:44,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:43:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 01:43:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-27 01:43:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 01:43:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2020-10-27 01:43:44,191 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 150 [2020-10-27 01:43:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:44,191 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2020-10-27 01:43:44,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:43:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2020-10-27 01:43:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 01:43:44,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:44,192 INFO L422 BasicCegarLoop]: trace histogram [62, 41, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:44,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:43:44,192 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash -150920763, now seen corresponding path program 61 times [2020-10-27 01:43:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:44,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178796848] [2020-10-27 01:43:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:44,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:43:44,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:45,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:45,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:45,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:45,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:45,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:45,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:45,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:45,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:45,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:45,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:45,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1763 proven. 441 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:45,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178796848] [2020-10-27 01:43:45,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:45,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:43:45,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840589040] [2020-10-27 01:43:45,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:43:45,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:45,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:43:45,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:43:45,277 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand 25 states. [2020-10-27 01:43:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:46,690 INFO L93 Difference]: Finished difference Result 160 states and 183 transitions. [2020-10-27 01:43:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:43:46,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 152 [2020-10-27 01:43:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:46,693 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:43:46,693 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 01:43:46,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:43:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 01:43:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-27 01:43:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:43:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 177 transitions. [2020-10-27 01:43:46,704 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 177 transitions. Word has length 152 [2020-10-27 01:43:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:46,704 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 177 transitions. [2020-10-27 01:43:46,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:43:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 177 transitions. [2020-10-27 01:43:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 01:43:46,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:46,706 INFO L422 BasicCegarLoop]: trace histogram [63, 41, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:46,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 01:43:46,706 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 759280811, now seen corresponding path program 62 times [2020-10-27 01:43:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:46,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691105618] [2020-10-27 01:43:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:47,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:43:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:47,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:47,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:47,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:47,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:47,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1845 proven. 484 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:47,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691105618] [2020-10-27 01:43:47,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:47,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:43:47,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096886568] [2020-10-27 01:43:47,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:43:47,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:43:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:43:47,954 INFO L87 Difference]: Start difference. First operand 155 states and 177 transitions. Second operand 26 states. [2020-10-27 01:43:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:49,394 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2020-10-27 01:43:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:43:49,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 154 [2020-10-27 01:43:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:49,396 INFO L225 Difference]: With dead ends: 162 [2020-10-27 01:43:49,396 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 01:43:49,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:43:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 01:43:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-27 01:43:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 01:43:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2020-10-27 01:43:49,407 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 154 [2020-10-27 01:43:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:49,408 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2020-10-27 01:43:49,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:43:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2020-10-27 01:43:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 01:43:49,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:49,409 INFO L422 BasicCegarLoop]: trace histogram [64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:49,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 01:43:49,409 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:49,410 INFO L82 PathProgramCache]: Analyzing trace with hash -710334959, now seen corresponding path program 63 times [2020-10-27 01:43:49,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:49,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577522806] [2020-10-27 01:43:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:49,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:43:50,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:50,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:50,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1927 proven. 529 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:50,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577522806] [2020-10-27 01:43:50,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:50,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:43:50,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841766500] [2020-10-27 01:43:50,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:43:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:43:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:43:50,655 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 27 states. [2020-10-27 01:43:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:52,179 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2020-10-27 01:43:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:43:52,180 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 156 [2020-10-27 01:43:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:52,181 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:43:52,181 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 01:43:52,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:43:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 01:43:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-27 01:43:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 01:43:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 183 transitions. [2020-10-27 01:43:52,191 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 183 transitions. Word has length 156 [2020-10-27 01:43:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:52,191 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 183 transitions. [2020-10-27 01:43:52,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:43:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 183 transitions. [2020-10-27 01:43:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 01:43:52,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:52,192 INFO L422 BasicCegarLoop]: trace histogram [65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:52,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 01:43:52,192 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash 33150455, now seen corresponding path program 64 times [2020-10-27 01:43:52,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:52,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425899674] [2020-10-27 01:43:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:52,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:52,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:43:52,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:53,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:53,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:53,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:53,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:53,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:53,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:53,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:53,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2009 proven. 576 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:53,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425899674] [2020-10-27 01:43:53,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:53,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:43:53,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091134643] [2020-10-27 01:43:53,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:43:53,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:53,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:43:53,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:43:53,487 INFO L87 Difference]: Start difference. First operand 159 states and 183 transitions. Second operand 28 states. [2020-10-27 01:43:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:55,170 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2020-10-27 01:43:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:43:55,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 158 [2020-10-27 01:43:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:55,172 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:43:55,172 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 01:43:55,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:43:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 01:43:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-27 01:43:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:43:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2020-10-27 01:43:55,184 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 158 [2020-10-27 01:43:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:55,184 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2020-10-27 01:43:55,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:43:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2020-10-27 01:43:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 01:43:55,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:55,186 INFO L422 BasicCegarLoop]: trace histogram [66, 41, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:55,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 01:43:55,186 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1558062173, now seen corresponding path program 65 times [2020-10-27 01:43:55,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:55,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695254854] [2020-10-27 01:43:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:55,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:56,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:56,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 01:43:56,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:56,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 01:43:56,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:56,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:43:56,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:56,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:43:56,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:56,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:56,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:56,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:56,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:56,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:56,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:56,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2091 proven. 625 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:56,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695254854] [2020-10-27 01:43:56,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:56,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:43:56,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369460296] [2020-10-27 01:43:56,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:43:56,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:56,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:43:56,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:43:56,562 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand 29 states. [2020-10-27 01:43:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:58,314 INFO L93 Difference]: Finished difference Result 168 states and 195 transitions. [2020-10-27 01:43:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:43:58,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 160 [2020-10-27 01:43:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:58,316 INFO L225 Difference]: With dead ends: 168 [2020-10-27 01:43:58,316 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 01:43:58,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:43:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 01:43:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-27 01:43:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 01:43:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2020-10-27 01:43:58,328 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 160 [2020-10-27 01:43:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:58,329 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2020-10-27 01:43:58,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:43:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2020-10-27 01:43:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 01:43:58,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:58,330 INFO L422 BasicCegarLoop]: trace histogram [67, 41, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:58,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 01:43:58,330 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:58,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:58,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1880592061, now seen corresponding path program 66 times [2020-10-27 01:43:58,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:58,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666614020] [2020-10-27 01:43:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:58,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:59,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:59,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 01:43:59,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-27 01:43:59,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:43:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:43:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:59,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:59,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:59,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:59,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:59,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:59,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:59,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:59,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2173 proven. 676 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:43:59,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666614020] [2020-10-27 01:43:59,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:59,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:43:59,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603560084] [2020-10-27 01:43:59,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:43:59,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:43:59,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:43:59,841 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand 30 states. [2020-10-27 01:44:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:01,633 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-10-27 01:44:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:44:01,633 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 162 [2020-10-27 01:44:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:01,635 INFO L225 Difference]: With dead ends: 170 [2020-10-27 01:44:01,635 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 01:44:01,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:44:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 01:44:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-27 01:44:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:44:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2020-10-27 01:44:01,647 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 162 [2020-10-27 01:44:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:01,647 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2020-10-27 01:44:01,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:44:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2020-10-27 01:44:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 01:44:01,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:01,649 INFO L422 BasicCegarLoop]: trace histogram [68, 41, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:01,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 01:44:01,649 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash 697506985, now seen corresponding path program 67 times [2020-10-27 01:44:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:01,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687613580] [2020-10-27 01:44:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:01,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:02,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:02,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 01:44:02,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:02,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-27 01:44:02,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:44:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:44:02,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:03,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:03,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:03,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:03,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:03,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:03,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:03,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:03,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2255 proven. 729 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:03,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687613580] [2020-10-27 01:44:03,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:03,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:44:03,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716423961] [2020-10-27 01:44:03,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:44:03,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:44:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:44:03,196 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand 31 states. [2020-10-27 01:44:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:05,130 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-10-27 01:44:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:44:05,131 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 164 [2020-10-27 01:44:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:05,132 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:44:05,132 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 01:44:05,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:44:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 01:44:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-27 01:44:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:44:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2020-10-27 01:44:05,142 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 164 [2020-10-27 01:44:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:05,142 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2020-10-27 01:44:05,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:44:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2020-10-27 01:44:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-27 01:44:05,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:05,143 INFO L422 BasicCegarLoop]: trace histogram [69, 41, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:05,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-27 01:44:05,144 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 54560399, now seen corresponding path program 68 times [2020-10-27 01:44:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:05,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242333230] [2020-10-27 01:44:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:05,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:06,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:06,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 01:44:06,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:06,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-27 01:44:06,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:06,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:44:06,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:06,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:44:06,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:06,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:06,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:06,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2337 proven. 784 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:06,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242333230] [2020-10-27 01:44:06,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:06,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:44:06,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810125067] [2020-10-27 01:44:06,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:44:06,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:06,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:44:06,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:44:06,777 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand 32 states. [2020-10-27 01:44:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:08,803 INFO L93 Difference]: Finished difference Result 174 states and 204 transitions. [2020-10-27 01:44:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:44:08,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 166 [2020-10-27 01:44:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:08,805 INFO L225 Difference]: With dead ends: 174 [2020-10-27 01:44:08,805 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 01:44:08,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:44:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 01:44:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-27 01:44:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 01:44:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2020-10-27 01:44:08,814 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 166 [2020-10-27 01:44:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:08,814 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2020-10-27 01:44:08,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:44:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2020-10-27 01:44:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 01:44:08,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:08,815 INFO L422 BasicCegarLoop]: trace histogram [70, 41, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:08,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-27 01:44:08,816 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash 658181877, now seen corresponding path program 69 times [2020-10-27 01:44:08,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:08,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377801442] [2020-10-27 01:44:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:08,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:09,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:09,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-27 01:44:09,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-27 01:44:09,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:44:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:44:09,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:10,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:10,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:10,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2419 proven. 841 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:10,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377801442] [2020-10-27 01:44:10,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:10,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:44:10,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234614071] [2020-10-27 01:44:10,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:44:10,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:10,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:44:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:44:10,553 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand 33 states. [2020-10-27 01:44:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:12,681 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2020-10-27 01:44:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:44:12,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 168 [2020-10-27 01:44:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:12,683 INFO L225 Difference]: With dead ends: 176 [2020-10-27 01:44:12,684 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 01:44:12,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:44:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 01:44:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-10-27 01:44:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 01:44:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2020-10-27 01:44:12,693 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 168 [2020-10-27 01:44:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:12,694 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2020-10-27 01:44:12,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:44:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2020-10-27 01:44:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 01:44:12,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:12,695 INFO L422 BasicCegarLoop]: trace histogram [71, 41, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:12,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-27 01:44:12,695 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash 917837275, now seen corresponding path program 70 times [2020-10-27 01:44:12,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:12,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757843610] [2020-10-27 01:44:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:12,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:14,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:14,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 01:44:14,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:14,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1348 [2020-10-27 01:44:14,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:14,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:44:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:44:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:14,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:14,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:14,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:14,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:14,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:14,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:14,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:14,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:14,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:14,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:14,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2501 proven. 900 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:14,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757843610] [2020-10-27 01:44:14,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:14,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:44:14,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445447865] [2020-10-27 01:44:14,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:44:14,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:14,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:44:14,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:44:14,799 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand 34 states. [2020-10-27 01:44:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:17,044 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-10-27 01:44:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:44:17,044 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 170 [2020-10-27 01:44:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:17,046 INFO L225 Difference]: With dead ends: 178 [2020-10-27 01:44:17,046 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 01:44:17,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:44:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 01:44:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-27 01:44:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 01:44:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-10-27 01:44:17,058 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 170 [2020-10-27 01:44:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:17,058 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-10-27 01:44:17,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:44:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-10-27 01:44:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 01:44:17,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:17,059 INFO L422 BasicCegarLoop]: trace histogram [72, 41, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:17,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-27 01:44:17,060 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:17,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1338571585, now seen corresponding path program 71 times [2020-10-27 01:44:17,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:17,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744417119] [2020-10-27 01:44:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:17,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:18,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:18,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 01:44:18,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:18,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1147 [2020-10-27 01:44:18,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:18,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:44:18,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:18,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:44:18,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:19,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:19,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:19,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:19,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:19,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:19,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:19,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2583 proven. 961 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:19,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744417119] [2020-10-27 01:44:19,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:19,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:44:19,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663123605] [2020-10-27 01:44:19,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:44:19,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:44:19,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:44:19,042 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 35 states. [2020-10-27 01:44:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:21,339 INFO L93 Difference]: Finished difference Result 180 states and 213 transitions. [2020-10-27 01:44:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:44:21,340 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-27 01:44:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:21,341 INFO L225 Difference]: With dead ends: 180 [2020-10-27 01:44:21,341 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 01:44:21,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:44:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 01:44:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-27 01:44:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 01:44:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2020-10-27 01:44:21,354 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 172 [2020-10-27 01:44:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:21,354 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2020-10-27 01:44:21,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:44:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2020-10-27 01:44:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 01:44:21,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:21,356 INFO L422 BasicCegarLoop]: trace histogram [73, 41, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:21,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-27 01:44:21,356 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1937317671, now seen corresponding path program 72 times [2020-10-27 01:44:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:21,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771848067] [2020-10-27 01:44:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:21,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:22,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:44:22,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:23,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:23,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:23,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2665 proven. 1024 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:23,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771848067] [2020-10-27 01:44:23,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:23,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:44:23,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818045137] [2020-10-27 01:44:23,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:44:23,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:23,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:44:23,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:44:23,344 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand 36 states. [2020-10-27 01:44:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:25,744 INFO L93 Difference]: Finished difference Result 182 states and 216 transitions. [2020-10-27 01:44:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:44:25,745 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 174 [2020-10-27 01:44:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:25,746 INFO L225 Difference]: With dead ends: 182 [2020-10-27 01:44:25,746 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 01:44:25,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:44:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 01:44:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-27 01:44:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 01:44:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-10-27 01:44:25,760 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 174 [2020-10-27 01:44:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:25,760 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-10-27 01:44:25,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:44:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-10-27 01:44:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 01:44:25,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:25,762 INFO L422 BasicCegarLoop]: trace histogram [74, 41, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:25,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-27 01:44:25,762 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1806688653, now seen corresponding path program 73 times [2020-10-27 01:44:25,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:25,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994605636] [2020-10-27 01:44:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:25,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:26,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:26,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 01:44:26,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-27 01:44:26,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:44:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:44:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:27,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:27,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:27,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:27,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:27,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:27,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:27,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1089 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:27,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994605636] [2020-10-27 01:44:27,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:44:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677530593] [2020-10-27 01:44:27,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:44:27,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:44:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:44:27,852 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 37 states. [2020-10-27 01:44:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:30,403 INFO L93 Difference]: Finished difference Result 184 states and 219 transitions. [2020-10-27 01:44:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:44:30,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 176 [2020-10-27 01:44:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:30,406 INFO L225 Difference]: With dead ends: 184 [2020-10-27 01:44:30,406 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 01:44:30,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:44:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 01:44:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-10-27 01:44:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 01:44:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2020-10-27 01:44:30,416 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 176 [2020-10-27 01:44:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:30,416 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2020-10-27 01:44:30,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:44:30,416 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2020-10-27 01:44:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-27 01:44:30,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:30,417 INFO L422 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:30,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-27 01:44:30,417 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash 826253939, now seen corresponding path program 74 times [2020-10-27 01:44:30,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:30,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871640141] [2020-10-27 01:44:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:30,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:31,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:31,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 01:44:31,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1252 [2020-10-27 01:44:31,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:44:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:44:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:32,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:32,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:32,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2829 proven. 1156 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:32,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871640141] [2020-10-27 01:44:32,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:32,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:44:32,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843125424] [2020-10-27 01:44:32,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:44:32,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:44:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:44:32,575 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand 38 states. [2020-10-27 01:44:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:35,273 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2020-10-27 01:44:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:44:35,274 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2020-10-27 01:44:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:35,276 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:44:35,276 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 01:44:35,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:44:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 01:44:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-27 01:44:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 01:44:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2020-10-27 01:44:35,287 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 178 [2020-10-27 01:44:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:35,287 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2020-10-27 01:44:35,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:44:35,287 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2020-10-27 01:44:35,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 01:44:35,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:35,288 INFO L422 BasicCegarLoop]: trace histogram [76, 41, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:35,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-27 01:44:35,288 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash -773668391, now seen corresponding path program 75 times [2020-10-27 01:44:35,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:35,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004978081] [2020-10-27 01:44:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:35,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:36,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:36,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 01:44:36,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:36,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1326 [2020-10-27 01:44:36,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:36,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:44:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:44:36,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:37,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:37,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:37,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:37,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:37,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:37,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:37,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:37,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:37,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:37,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:37,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2911 proven. 1225 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:37,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004978081] [2020-10-27 01:44:37,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:37,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:44:37,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780254269] [2020-10-27 01:44:37,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:44:37,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:37,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:44:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:44:37,625 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand 39 states. [2020-10-27 01:44:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:40,388 INFO L93 Difference]: Finished difference Result 188 states and 225 transitions. [2020-10-27 01:44:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:44:40,388 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 180 [2020-10-27 01:44:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:40,390 INFO L225 Difference]: With dead ends: 188 [2020-10-27 01:44:40,390 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 01:44:40,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:44:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 01:44:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-27 01:44:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 01:44:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 219 transitions. [2020-10-27 01:44:40,402 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 219 transitions. Word has length 180 [2020-10-27 01:44:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:40,403 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 219 transitions. [2020-10-27 01:44:40,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:44:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 219 transitions. [2020-10-27 01:44:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 01:44:40,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:40,404 INFO L422 BasicCegarLoop]: trace histogram [77, 41, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:40,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-27 01:44:40,404 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash -700735553, now seen corresponding path program 76 times [2020-10-27 01:44:40,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:40,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660621212] [2020-10-27 01:44:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:40,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:41,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1344 [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:44:41,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:42,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:42,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:42,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:42,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:42,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:42,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2993 proven. 1296 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-27 01:44:42,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660621212] [2020-10-27 01:44:42,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:42,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:44:42,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442402310] [2020-10-27 01:44:42,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:44:42,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:44:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:44:42,831 INFO L87 Difference]: Start difference. First operand 183 states and 219 transitions. Second operand 40 states.