/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:31:37,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:31:37,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:31:37,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:31:37,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:31:37,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:31:37,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:31:37,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:31:37,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:31:37,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:31:37,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:31:37,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:31:37,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:31:37,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:31:37,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:31:37,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:31:37,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:31:37,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:31:37,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:31:37,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:31:37,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:31:37,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:31:37,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:31:37,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:31:37,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:31:37,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:31:37,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:31:37,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:31:37,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:31:37,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:31:37,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:31:37,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:31:37,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:31:37,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:31:37,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:31:37,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:31:37,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:31:37,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:31:37,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:31:37,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:31:37,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:31:37,382 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 01:31:37,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:31:37,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:31:37,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:31:37,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:31:37,433 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:31:37,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:31:37,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:31:37,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:31:37,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:31:37,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:31:37,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:31:37,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:31:37,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:31:37,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:31:37,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:31:37,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:31:37,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:31:37,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:31:37,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:31:37,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:31:37,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:31:37,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:31:37,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:31:37,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:31:37,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:31:37,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:31:37,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:31:37,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:31:37,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:31:37,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:31:37,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:31:37,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:31:37,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:31:37,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:31:37,918 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:31:37,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-27 01:31:37,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6029fa840/db17e16db7894b6c96de2f71750802c4/FLAGf618162f8 [2020-10-27 01:31:38,498 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:31:38,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-27 01:31:38,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6029fa840/db17e16db7894b6c96de2f71750802c4/FLAGf618162f8 [2020-10-27 01:31:38,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6029fa840/db17e16db7894b6c96de2f71750802c4 [2020-10-27 01:31:38,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:31:38,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:31:38,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:31:38,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:31:38,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:31:38,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:31:38" (1/1) ... [2020-10-27 01:31:38,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cdcd08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:38, skipping insertion in model container [2020-10-27 01:31:38,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:31:38" (1/1) ... [2020-10-27 01:31:38,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:31:38,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:31:39,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:31:39,114 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:31:39,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:31:39,148 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:31:39,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39 WrapperNode [2020-10-27 01:31:39,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:31:39,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:31:39,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:31:39,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:31:39,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (1/1) ... [2020-10-27 01:31:39,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (1/1) ... [2020-10-27 01:31:39,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (1/1) ... [2020-10-27 01:31:39,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (1/1) ... [2020-10-27 01:31:39,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (1/1) ... [2020-10-27 01:31:39,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (1/1) ... [2020-10-27 01:31:39,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (1/1) ... [2020-10-27 01:31:39,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:31:39,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:31:39,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:31:39,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:31:39,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (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 01:31:39,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:31:39,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:31:39,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:31:39,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:31:39,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:31:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:31:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:31:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:31:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:31:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:31:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:31:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:31:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:31:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:31:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:31:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:31:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:31:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:31:39,547 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:31:39,547 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:31:39,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:31:39 BoogieIcfgContainer [2020-10-27 01:31:39,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:31:39,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:31:39,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:31:39,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:31:39,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:31:38" (1/3) ... [2020-10-27 01:31:39,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31015b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:31:39, skipping insertion in model container [2020-10-27 01:31:39,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:31:39" (2/3) ... [2020-10-27 01:31:39,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31015b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:31:39, skipping insertion in model container [2020-10-27 01:31:39,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:31:39" (3/3) ... [2020-10-27 01:31:39,558 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2020-10-27 01:31:39,570 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:31:39,575 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:31:39,588 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:31:39,617 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:31:39,617 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:31:39,618 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:31:39,618 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:31:39,618 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:31:39,618 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:31:39,618 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:31:39,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:31:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 01:31:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:31:39,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:39,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:39,661 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:39,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2020849535, now seen corresponding path program 1 times [2020-10-27 01:31:39,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:39,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722993732] [2020-10-27 01:31:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:39,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:40,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:40,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:31:40,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:40,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 01:31:40,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:31:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:40,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:31:40,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:40,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:40,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:40,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:40,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:31:40,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:40,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:40,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:40,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:40,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:40,219 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 01:31:40,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722993732] [2020-10-27 01:31:40,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:40,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:31:40,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665638425] [2020-10-27 01:31:40,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:31:40,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:31:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:31:40,246 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 01:31:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:40,322 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-27 01:31:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:31:40,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:31:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:40,333 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:31:40,333 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:31:40,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:31:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:31:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:31:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:31:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-27 01:31:40,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-27 01:31:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:40,378 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-27 01:31:40,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:31:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-27 01:31:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:31:40,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:40,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:40,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:31:40,380 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1987826251, now seen corresponding path program 1 times [2020-10-27 01:31:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:40,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357108966] [2020-10-27 01:31:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:40,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:40,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:31:40,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:40,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 01:31:40,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:40,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:40,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:31:40,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:40,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:40,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:40,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:40,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:31:40,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:40,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:40,658 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 01:31:40,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357108966] [2020-10-27 01:31:40,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:40,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:40,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623661125] [2020-10-27 01:31:40,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:40,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:40,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:40,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:40,666 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-27 01:31:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:40,854 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-27 01:31:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:31:40,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:31:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:40,857 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:31:40,857 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:31:40,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:31:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:31:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-27 01:31:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:31:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 01:31:40,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 01:31:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:40,871 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 01:31:40,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 01:31:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:31:40,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:40,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:40,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:31:40,873 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:40,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1243554288, now seen corresponding path program 1 times [2020-10-27 01:31:40,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:40,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225949135] [2020-10-27 01:31:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:40,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:41,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:41,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:31:41,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:41,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 01:31:41,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:41,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:31:41,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:41,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:31:41,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:41,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:41,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:41,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:41,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:41,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:41,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:31:41,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:41,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:41,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225949135] [2020-10-27 01:31:41,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:41,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:31:41,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917508387] [2020-10-27 01:31:41,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:31:41,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:41,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:31:41,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:31:41,338 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-10-27 01:31:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:41,629 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-27 01:31:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:31:41,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 01:31:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:41,632 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:31:41,632 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:31:41,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:31:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:31:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 01:31:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:31:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 01:31:41,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-27 01:31:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:41,651 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 01:31:41,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:31:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 01:31:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:31:41,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:41,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:41,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:31:41,654 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1338897259, now seen corresponding path program 2 times [2020-10-27 01:31:41,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:41,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419309874] [2020-10-27 01:31:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:41,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:41,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:41,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:31:41,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:41,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 01:31:41,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:41,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:31:41,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:41,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:31:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:41,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:41,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:41,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:41,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:41,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:31:41,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:41,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:41,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:41,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:41,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419309874] [2020-10-27 01:31:41,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:41,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:31:41,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496040443] [2020-10-27 01:31:41,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:31:41,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:31:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:31:41,958 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-10-27 01:31:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:42,226 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-27 01:31:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:31:42,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:31:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:42,228 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:31:42,228 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:31:42,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:31:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:31:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 01:31:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:31:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-27 01:31:42,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-27 01:31:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:42,236 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-27 01:31:42,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:31:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-27 01:31:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:31:42,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:42,237 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:42,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:31:42,238 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2018955629, now seen corresponding path program 1 times [2020-10-27 01:31:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:42,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443434428] [2020-10-27 01:31:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:42,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:42,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:31:42,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:42,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 01:31:42,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:31:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:31:42,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:42,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:42,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:42,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:42,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:31:42,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:42,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:31:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:42,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443434428] [2020-10-27 01:31:42,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:42,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:42,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646497800] [2020-10-27 01:31:42,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:42,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:42,422 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-10-27 01:31:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:42,534 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-10-27 01:31:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:31:42,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 01:31:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:42,537 INFO L225 Difference]: With dead ends: 31 [2020-10-27 01:31:42,537 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:31:42,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:31:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:31:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 01:31:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:31:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 01:31:42,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2020-10-27 01:31:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:42,552 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 01:31:42,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 01:31:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:31:42,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:42,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:42,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:31:42,555 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash 501004305, now seen corresponding path program 1 times [2020-10-27 01:31:42,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:42,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011775866] [2020-10-27 01:31:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:42,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:42,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:31:42,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:42,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 01:31:42,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:31:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:31:42,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:42,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:42,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:42,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:42,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:42,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:42,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:31:42,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:42,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:42,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:42,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:43,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011775866] [2020-10-27 01:31:43,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:43,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:31:43,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643863022] [2020-10-27 01:31:43,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:31:43,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:43,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:31:43,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:31:43,004 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-10-27 01:31:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:43,335 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-27 01:31:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:31:43,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:31:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:43,336 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:31:43,336 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:31:43,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:31:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:31:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 01:31:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:31:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-27 01:31:43,348 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2020-10-27 01:31:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:43,349 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-27 01:31:43,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:31:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-27 01:31:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:31:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:43,350 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:43,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:31:43,351 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1525788122, now seen corresponding path program 3 times [2020-10-27 01:31:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:43,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434611167] [2020-10-27 01:31:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:43,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:31:43,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:43,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 01:31:43,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:31:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:31:43,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:43,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:43,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:43,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:43,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434611167] [2020-10-27 01:31:43,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:43,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:31:43,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257067701] [2020-10-27 01:31:43,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:31:43,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:43,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:31:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:31:43,606 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-10-27 01:31:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:43,870 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-27 01:31:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:31:43,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:31:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:43,871 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:31:43,871 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:31:43,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:31:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:31:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-27 01:31:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:31:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-27 01:31:43,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-10-27 01:31:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:43,881 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-27 01:31:43,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:31:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-27 01:31:43,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:31:43,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:43,882 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:43,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:31:43,883 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash -929277610, now seen corresponding path program 2 times [2020-10-27 01:31:43,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:43,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181136626] [2020-10-27 01:31:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:43,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:43,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:31:43,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 01:31:43,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:31:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:31:43,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:43,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:43,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:43,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:43,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:43,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:43,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:43,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:43,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:43,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:43,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:31:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181136626] [2020-10-27 01:31:44,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:44,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:44,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073141975] [2020-10-27 01:31:44,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:44,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:44,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:44,005 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-10-27 01:31:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:44,071 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-27 01:31:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:31:44,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 01:31:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:44,072 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:31:44,072 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:31:44,073 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 01:31:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:31:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 01:31:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:31:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 01:31:44,080 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-27 01:31:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:44,080 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 01:31:44,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:44,080 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 01:31:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:31:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:44,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:44,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:31:44,081 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1630342188, now seen corresponding path program 2 times [2020-10-27 01:31:44,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:44,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271994341] [2020-10-27 01:31:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:44,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:44,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:44,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:31:44,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:44,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 01:31:44,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:31:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:44,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:31:44,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:44,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:44,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:44,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:44,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:44,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271994341] [2020-10-27 01:31:44,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:44,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:31:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976763622] [2020-10-27 01:31:44,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:31:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:31:44,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:31:44,340 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-27 01:31:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:44,593 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-27 01:31:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:31:44,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:31:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:44,595 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:31:44,595 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:31:44,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:31:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:31:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:31:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:31:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 01:31:44,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2020-10-27 01:31:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:44,605 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 01:31:44,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:31:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 01:31:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:31:44,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:44,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:44,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:31:44,606 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1414402527, now seen corresponding path program 4 times [2020-10-27 01:31:44,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:44,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609757715] [2020-10-27 01:31:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:44,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:44,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:44,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:31:44,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:44,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 01:31:44,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:31:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:44,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:31:44,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:44,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:44,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:44,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:44,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:44,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:44,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:44,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:44,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609757715] [2020-10-27 01:31:44,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:44,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:31:44,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986936095] [2020-10-27 01:31:44,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:31:44,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:31:44,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:31:44,837 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-27 01:31:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:45,151 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 01:31:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:31:45,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:31:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:45,152 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:31:45,152 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:31:45,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:31:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:31:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 01:31:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:31:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-27 01:31:45,162 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2020-10-27 01:31:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:45,163 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-27 01:31:45,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:31:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-27 01:31:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:31:45,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:45,164 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:45,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:31:45,164 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1747028132, now seen corresponding path program 5 times [2020-10-27 01:31:45,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:45,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814319737] [2020-10-27 01:31:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:45,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:45,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:31:45,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:45,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 01:31:45,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:45,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:31:45,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:45,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:31:45,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:45,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:45,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:45,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:45,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:45,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:45,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:45,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:45,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:45,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814319737] [2020-10-27 01:31:45,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:45,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:31:45,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823281768] [2020-10-27 01:31:45,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:31:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:45,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:31:45,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:31:45,496 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-27 01:31:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:45,833 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-27 01:31:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:31:45,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:31:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:45,834 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:31:45,834 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:31:45,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:31:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:31:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 01:31:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:31:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-27 01:31:45,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2020-10-27 01:31:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:45,844 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-27 01:31:45,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:31:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-27 01:31:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:31:45,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:45,845 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:45,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:31:45,846 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:45,846 INFO L82 PathProgramCache]: Analyzing trace with hash 457567514, now seen corresponding path program 3 times [2020-10-27 01:31:45,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:45,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680651911] [2020-10-27 01:31:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:45,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:45,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:45,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:31:45,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 01:31:45,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:31:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:31:45,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:31:46,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:46,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:46,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:46,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:46,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:46,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:46,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:46,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680651911] [2020-10-27 01:31:46,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:46,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:31:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495153362] [2020-10-27 01:31:46,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:31:46,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:31:46,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:31:46,120 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2020-10-27 01:31:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:46,495 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-27 01:31:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:31:46,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:31:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:46,499 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:31:46,499 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:31:46,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:31:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:31:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 01:31:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:31:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-27 01:31:46,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 22 [2020-10-27 01:31:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:46,509 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-27 01:31:46,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:31:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-27 01:31:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:31:46,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:46,510 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:46,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:31:46,511 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:46,511 INFO L82 PathProgramCache]: Analyzing trace with hash -722312663, now seen corresponding path program 6 times [2020-10-27 01:31:46,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:46,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909646156] [2020-10-27 01:31:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:46,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:46,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:46,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:31:46,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:46,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 01:31:46,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:31:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:31:46,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:46,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:46,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:46,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:46,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:46,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:46,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:46,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909646156] [2020-10-27 01:31:46,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:46,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:31:46,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890677116] [2020-10-27 01:31:46,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:31:46,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:31:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:31:46,802 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-27 01:31:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:47,198 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-27 01:31:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:31:47,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 01:31:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:47,199 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:31:47,199 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:31:47,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:31:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:31:47,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 01:31:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:31:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-27 01:31:47,213 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2020-10-27 01:31:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:47,214 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-27 01:31:47,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:31:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-27 01:31:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:31:47,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:47,217 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:47,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:31:47,217 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1358098030, now seen corresponding path program 7 times [2020-10-27 01:31:47,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:47,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700532569] [2020-10-27 01:31:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:47,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:47,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:47,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:31:47,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:47,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 01:31:47,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:47,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:31:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:31:47,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:47,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:47,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:47,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:47,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:31:47,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:47,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700532569] [2020-10-27 01:31:47,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:47,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:31:47,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808000939] [2020-10-27 01:31:47,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:31:47,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:47,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:31:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:31:47,635 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-10-27 01:31:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:48,127 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-27 01:31:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:31:48,128 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 01:31:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:48,128 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:31:48,129 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:31:48,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:31:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:31:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 01:31:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:31:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-27 01:31:48,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 26 [2020-10-27 01:31:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:48,139 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-27 01:31:48,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:31:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-27 01:31:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:31:48,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:48,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:48,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:31:48,140 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash -949038240, now seen corresponding path program 4 times [2020-10-27 01:31:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:48,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167497482] [2020-10-27 01:31:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:48,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:48,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:48,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:31:48,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 01:31:48,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:31:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:31:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:48,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:48,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:48,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:48,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:48,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:48,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:31:48,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:48,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167497482] [2020-10-27 01:31:48,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:48,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:31:48,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58837233] [2020-10-27 01:31:48,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:31:48,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:48,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:31:48,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:31:48,538 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2020-10-27 01:31:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:49,018 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-27 01:31:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:31:49,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 01:31:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:49,020 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:31:49,020 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:31:49,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:31:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:31:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:31:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:31:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 01:31:49,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2020-10-27 01:31:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:49,039 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 01:31:49,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:31:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 01:31:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:31:49,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:49,041 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:49,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:31:49,041 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash -821985933, now seen corresponding path program 8 times [2020-10-27 01:31:49,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:49,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180727146] [2020-10-27 01:31:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:49,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:49,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:49,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:31:49,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:49,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 01:31:49,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:31:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:31:49,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:49,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:49,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:49,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:49,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:49,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:49,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:31:49,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:49,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:49,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:49,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:49,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180727146] [2020-10-27 01:31:49,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:49,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:31:49,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445085747] [2020-10-27 01:31:49,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:31:49,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:49,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:31:49,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:31:49,499 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-27 01:31:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:50,024 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-27 01:31:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:31:50,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 01:31:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:50,027 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:31:50,027 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:31:50,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:31:50,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:31:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 01:31:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:31:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-27 01:31:50,037 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 28 [2020-10-27 01:31:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:50,038 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-27 01:31:50,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:31:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-27 01:31:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:31:50,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:50,041 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:50,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:31:50,041 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash 61366072, now seen corresponding path program 9 times [2020-10-27 01:31:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:50,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518863816] [2020-10-27 01:31:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:50,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:50,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:50,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:31:50,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:50,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 01:31:50,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:50,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:31:50,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:50,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:31:50,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:31:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:50,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:50,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:50,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:50,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:50,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:50,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:50,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:50,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:50,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518863816] [2020-10-27 01:31:50,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:50,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:31:50,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797045616] [2020-10-27 01:31:50,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:31:50,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:50,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:31:50,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:31:50,546 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2020-10-27 01:31:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:51,105 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-27 01:31:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:31:51,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 01:31:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:51,107 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:31:51,107 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:31:51,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:31:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:31:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 01:31:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:31:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-27 01:31:51,130 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 30 [2020-10-27 01:31:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:51,130 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-27 01:31:51,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:31:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-27 01:31:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:31:51,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:51,131 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:51,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:31:51,132 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash -863033690, now seen corresponding path program 5 times [2020-10-27 01:31:51,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:51,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507193029] [2020-10-27 01:31:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:51,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:51,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:31:51,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 01:31:51,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:31:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:31:51,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:51,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:51,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:51,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:51,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:51,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:31:51,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:51,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:51,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507193029] [2020-10-27 01:31:51,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:51,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:31:51,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304799629] [2020-10-27 01:31:51,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:31:51,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:31:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:31:51,599 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 13 states. [2020-10-27 01:31:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:52,193 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-27 01:31:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:31:52,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 01:31:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:52,194 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:31:52,194 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:31:52,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:31:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:31:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 01:31:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:31:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 01:31:52,204 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 30 [2020-10-27 01:31:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:52,204 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 01:31:52,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:31:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 01:31:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:31:52,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:52,205 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:52,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:31:52,206 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1440881731, now seen corresponding path program 10 times [2020-10-27 01:31:52,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:52,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845152869] [2020-10-27 01:31:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:52,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:52,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:52,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:31:52,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:52,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 01:31:52,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:52,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:31:52,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:52,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:31:52,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:52,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:52,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:52,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:52,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:52,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:52,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:52,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:52,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:52,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:52,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845152869] [2020-10-27 01:31:52,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:52,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:31:52,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590316030] [2020-10-27 01:31:52,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:31:52,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:31:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:31:52,725 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-27 01:31:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:53,416 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-27 01:31:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:31:53,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 01:31:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:53,418 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:31:53,418 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:31:53,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:31:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:31:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 01:31:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:31:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-27 01:31:53,434 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 32 [2020-10-27 01:31:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:53,434 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-27 01:31:53,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:31:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-27 01:31:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:31:53,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:53,436 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:53,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:31:53,436 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1992008958, now seen corresponding path program 11 times [2020-10-27 01:31:53,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:53,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035250493] [2020-10-27 01:31:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:53,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:53,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:31:53,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:53,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 01:31:53,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:31:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:31:53,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:53,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:53,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:53,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:53,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:53,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:53,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:31:53,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:53,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:53,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:53,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:53,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:53,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035250493] [2020-10-27 01:31:53,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:53,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:31:53,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468282690] [2020-10-27 01:31:53,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:31:53,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:31:53,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:31:53,976 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 15 states. [2020-10-27 01:31:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:54,780 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-27 01:31:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:31:54,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:31:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:54,781 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:31:54,781 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:31:54,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:31:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:31:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 01:31:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:31:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-27 01:31:54,792 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 34 [2020-10-27 01:31:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:54,792 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-27 01:31:54,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:31:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-27 01:31:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:31:54,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:54,793 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:54,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:31:54,793 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -685218068, now seen corresponding path program 6 times [2020-10-27 01:31:54,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:54,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563864569] [2020-10-27 01:31:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:54,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:55,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:55,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:31:55,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:55,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 01:31:55,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:55,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:31:55,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:55,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:31:55,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:55,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:55,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:55,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:55,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:55,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:55,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:55,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563864569] [2020-10-27 01:31:55,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:55,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:31:55,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482823877] [2020-10-27 01:31:55,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:31:55,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:31:55,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:31:55,338 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-10-27 01:31:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:56,216 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-27 01:31:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:31:56,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:31:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:56,217 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:31:56,218 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:31:56,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:31:56,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:31:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 01:31:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:31:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-27 01:31:56,229 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 34 [2020-10-27 01:31:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:56,229 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-27 01:31:56,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:31:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-27 01:31:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:31:56,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:56,230 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:56,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:31:56,231 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash 950670599, now seen corresponding path program 12 times [2020-10-27 01:31:56,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:56,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50028247] [2020-10-27 01:31:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:56,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:56,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:56,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:31:56,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:56,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-27 01:31:56,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:31:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:31:56,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:56,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:56,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:56,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:56,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:56,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:56,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:56,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:56,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50028247] [2020-10-27 01:31:56,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:56,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:31:56,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836539591] [2020-10-27 01:31:56,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:31:56,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:31:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:31:56,844 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 16 states. [2020-10-27 01:31:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:57,741 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-27 01:31:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:31:57,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-27 01:31:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:57,745 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:31:57,745 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:31:57,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:31:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:31:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 01:31:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:31:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 01:31:57,756 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 36 [2020-10-27 01:31:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:57,756 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 01:31:57,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:31:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 01:31:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:31:57,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:57,757 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:57,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:31:57,757 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1517723188, now seen corresponding path program 13 times [2020-10-27 01:31:57,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:57,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206906667] [2020-10-27 01:31:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:57,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:58,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:58,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:31:58,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:58,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-27 01:31:58,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:58,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:31:58,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:58,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:31:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:58,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:58,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:58,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:58,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:58,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:58,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:31:58,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:58,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:58,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:58,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:58,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:31:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206906667] [2020-10-27 01:31:58,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:31:58,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:31:58,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052068708] [2020-10-27 01:31:58,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:31:58,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:31:58,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:31:58,456 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-10-27 01:31:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:59,410 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-27 01:31:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:31:59,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 01:31:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:59,413 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:31:59,413 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:31:59,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:31:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:31:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 01:31:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:31:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-27 01:31:59,429 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 38 [2020-10-27 01:31:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:59,429 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-27 01:31:59,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:31:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-27 01:31:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:31:59,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:59,430 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:31:59,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:31:59,430 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:59,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1996231730, now seen corresponding path program 7 times [2020-10-27 01:31:59,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:59,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957140974] [2020-10-27 01:31:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:59,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:59,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:31:59,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:59,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 01:31:59,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:59,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:31:59,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:31:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:31:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:00,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:00,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:00,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:00,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:00,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:00,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:00,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957140974] [2020-10-27 01:32:00,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:00,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:32:00,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342627812] [2020-10-27 01:32:00,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:32:00,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:32:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:32:00,115 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 17 states. [2020-10-27 01:32:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:01,115 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-27 01:32:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:32:01,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 01:32:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:01,117 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:32:01,117 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:32:01,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:32:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:32:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 01:32:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:32:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-27 01:32:01,135 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 38 [2020-10-27 01:32:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:01,135 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-27 01:32:01,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:32:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-27 01:32:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:32:01,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:01,136 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:01,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:32:01,136 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1472762193, now seen corresponding path program 14 times [2020-10-27 01:32:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:01,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871777254] [2020-10-27 01:32:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:01,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:01,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:01,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:32:01,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:01,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-27 01:32:01,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:32:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:32:01,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:01,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:01,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:01,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:01,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:01,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:01,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:01,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:01,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:01,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:01,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871777254] [2020-10-27 01:32:01,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:01,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:32:01,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082532355] [2020-10-27 01:32:01,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:32:01,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:01,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:32:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:32:01,895 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 18 states. [2020-10-27 01:32:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:02,950 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 01:32:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:32:02,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 01:32:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:02,952 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:32:02,952 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:32:02,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:32:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:32:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 01:32:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:32:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-27 01:32:02,963 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 40 [2020-10-27 01:32:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:02,963 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-27 01:32:02,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:32:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-27 01:32:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:32:02,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:02,964 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:02,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:32:02,964 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1996092310, now seen corresponding path program 15 times [2020-10-27 01:32:02,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:02,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765430389] [2020-10-27 01:32:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:03,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:03,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:32:03,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:03,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-27 01:32:03,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:32:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:32:03,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:03,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:03,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:03,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:03,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:03,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:03,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:03,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765430389] [2020-10-27 01:32:03,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:03,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:32:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587743063] [2020-10-27 01:32:03,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:32:03,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:32:03,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:32:03,731 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 19 states. [2020-10-27 01:32:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:04,883 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-27 01:32:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:32:04,883 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 01:32:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:04,884 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:32:04,884 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:32:04,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:32:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:32:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 01:32:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:32:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-27 01:32:04,894 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 42 [2020-10-27 01:32:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:04,894 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-27 01:32:04,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:32:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-27 01:32:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:32:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:04,895 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:04,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:32:04,895 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2131471992, now seen corresponding path program 8 times [2020-10-27 01:32:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:04,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435504208] [2020-10-27 01:32:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:04,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:05,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:05,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:32:05,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:05,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-27 01:32:05,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:05,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:32:05,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:05,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:32:05,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:05,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:05,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:05,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:05,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:05,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:05,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:05,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:05,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435504208] [2020-10-27 01:32:05,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:05,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:32:05,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326499640] [2020-10-27 01:32:05,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:32:05,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:05,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:32:05,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:32:05,699 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 19 states. [2020-10-27 01:32:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:06,936 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-27 01:32:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:32:06,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 01:32:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:06,937 INFO L225 Difference]: With dead ends: 85 [2020-10-27 01:32:06,937 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:32:06,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:32:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:32:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 01:32:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:32:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-27 01:32:06,949 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 42 [2020-10-27 01:32:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:06,949 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-27 01:32:06,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:32:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-27 01:32:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:32:06,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:06,950 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:06,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:32:06,950 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1889806181, now seen corresponding path program 16 times [2020-10-27 01:32:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:06,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474369128] [2020-10-27 01:32:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:06,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:07,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:32:07,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:07,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-27 01:32:07,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:07,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:32:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:32:07,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:07,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:07,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:07,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:07,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:07,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:07,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:07,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:07,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:07,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:07,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:07,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474369128] [2020-10-27 01:32:07,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:07,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:32:07,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111496811] [2020-10-27 01:32:07,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:32:07,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:07,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:32:07,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:32:07,840 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2020-10-27 01:32:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:09,087 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-27 01:32:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:32:09,087 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-27 01:32:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:09,088 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:32:09,089 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:32:09,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:32:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:32:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 01:32:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:32:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-27 01:32:09,100 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 44 [2020-10-27 01:32:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:09,100 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-27 01:32:09,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:32:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-27 01:32:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:32:09,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:09,101 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:09,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:32:09,101 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash 383291488, now seen corresponding path program 17 times [2020-10-27 01:32:09,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:09,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517540271] [2020-10-27 01:32:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:09,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:09,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:09,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:32:09,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:09,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-27 01:32:09,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:32:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:32:09,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:10,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:10,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:10,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:32:10,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:10,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:10,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517540271] [2020-10-27 01:32:10,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:10,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:32:10,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817166943] [2020-10-27 01:32:10,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:32:10,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:32:10,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:32:10,019 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 21 states. [2020-10-27 01:32:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:11,458 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-27 01:32:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:32:11,459 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 01:32:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:11,460 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:32:11,460 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:32:11,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:32:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:32:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 01:32:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:32:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-27 01:32:11,473 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 46 [2020-10-27 01:32:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:11,473 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-27 01:32:11,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:32:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-27 01:32:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:32:11,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:11,474 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:11,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:32:11,475 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1704506814, now seen corresponding path program 9 times [2020-10-27 01:32:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:11,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057618213] [2020-10-27 01:32:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:11,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:11,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:32:11,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:11,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-27 01:32:11,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:32:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:32:11,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:12,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:12,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:12,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:12,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:12,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:32:12,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:12,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:12,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:12,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:12,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057618213] [2020-10-27 01:32:12,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:12,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:32:12,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486193066] [2020-10-27 01:32:12,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:32:12,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:32:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:32:12,394 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 21 states. [2020-10-27 01:32:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:13,969 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-27 01:32:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:32:13,970 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 01:32:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:13,971 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:32:13,971 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:32:13,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:32:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:32:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 01:32:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:32:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-27 01:32:13,983 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 46 [2020-10-27 01:32:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:13,983 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-27 01:32:13,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:32:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-27 01:32:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:32:13,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:13,984 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:13,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:32:13,984 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:13,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1308202267, now seen corresponding path program 18 times [2020-10-27 01:32:13,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:13,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797821088] [2020-10-27 01:32:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:14,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:14,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:14,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:32:14,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-27 01:32:14,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:32:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:32:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:14,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:14,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:14,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:14,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:14,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:14,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:14,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:14,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:14,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797821088] [2020-10-27 01:32:14,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:14,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:32:14,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334011895] [2020-10-27 01:32:14,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:32:14,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:32:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:32:14,967 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 22 states. [2020-10-27 01:32:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:16,404 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-27 01:32:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:32:16,406 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-27 01:32:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:16,407 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:32:16,407 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:32:16,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:32:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:32:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 01:32:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:32:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-27 01:32:16,421 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 48 [2020-10-27 01:32:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:16,422 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-27 01:32:16,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:32:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-27 01:32:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:32:16,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:16,423 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:16,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:32:16,424 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash 958904362, now seen corresponding path program 19 times [2020-10-27 01:32:16,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:16,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232103102] [2020-10-27 01:32:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:16,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:16,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:16,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:32:16,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:16,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-27 01:32:16,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:32:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:16,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:32:16,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:17,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:17,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:17,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:17,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:17,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:17,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:17,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:17,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:17,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:32:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:17,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232103102] [2020-10-27 01:32:17,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:17,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:32:17,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663082555] [2020-10-27 01:32:17,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:32:17,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:32:17,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:32:17,433 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 23 states. [2020-10-27 01:32:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:19,134 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-27 01:32:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:32:19,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 01:32:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:19,135 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:32:19,136 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:32:19,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:32:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:32:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 01:32:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:32:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-27 01:32:19,146 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 50 [2020-10-27 01:32:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:19,146 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-27 01:32:19,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:32:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-27 01:32:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:32:19,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:19,147 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:19,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:32:19,148 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1541101052, now seen corresponding path program 10 times [2020-10-27 01:32:19,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:19,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81243729] [2020-10-27 01:32:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:19,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:19,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:19,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:32:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-27 01:32:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:32:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:32:19,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:20,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:20,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:20,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:20,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:20,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:20,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:20,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:20,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:20,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81243729] [2020-10-27 01:32:20,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:20,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:32:20,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758933457] [2020-10-27 01:32:20,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:32:20,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:32:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:32:20,213 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 23 states. [2020-10-27 01:32:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:22,065 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-27 01:32:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:32:22,065 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 01:32:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:22,067 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:32:22,067 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:32:22,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:32:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:32:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 01:32:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:32:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-27 01:32:22,079 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 50 [2020-10-27 01:32:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:22,079 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-27 01:32:22,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:32:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-27 01:32:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:32:22,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:22,080 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:22,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:32:22,080 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2099955759, now seen corresponding path program 20 times [2020-10-27 01:32:22,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:22,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182797917] [2020-10-27 01:32:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:22,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:22,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:22,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:32:22,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:22,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-27 01:32:22,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:22,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:32:22,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:22,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:32:22,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:23,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:23,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:23,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:23,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:23,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:23,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:23,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182797917] [2020-10-27 01:32:23,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:23,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:32:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908390074] [2020-10-27 01:32:23,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:32:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:32:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:32:23,266 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 24 states. [2020-10-27 01:32:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:25,109 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-27 01:32:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:32:25,111 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-27 01:32:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:25,112 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:32:25,112 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:32:25,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:32:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:32:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 01:32:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:32:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-27 01:32:25,124 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 52 [2020-10-27 01:32:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:25,124 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-27 01:32:25,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:32:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-27 01:32:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:32:25,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:25,125 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:25,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:32:25,125 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -861279500, now seen corresponding path program 21 times [2020-10-27 01:32:25,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:25,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777649220] [2020-10-27 01:32:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:25,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:25,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:25,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:32:25,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:25,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-27 01:32:25,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:32:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:25,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:32:25,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:26,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:26,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:26,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:26,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:26,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:26,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:26,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:26,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777649220] [2020-10-27 01:32:26,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:26,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:32:26,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30571293] [2020-10-27 01:32:26,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:32:26,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:32:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:32:26,440 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 25 states. [2020-10-27 01:32:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:28,334 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-27 01:32:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:32:28,334 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-27 01:32:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:28,336 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:32:28,336 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:32:28,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:32:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:32:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 01:32:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 01:32:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-27 01:32:28,348 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 54 [2020-10-27 01:32:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:28,348 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-27 01:32:28,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:32:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-27 01:32:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:32:28,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:28,349 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:28,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:32:28,349 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 393284426, now seen corresponding path program 11 times [2020-10-27 01:32:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:28,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377586867] [2020-10-27 01:32:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:28,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:28,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:28,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:32:28,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:28,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 01:32:28,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:28,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:32:28,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:28,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:32:28,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:29,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:29,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:29,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:29,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:29,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:29,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:32:29,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:29,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:29,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:29,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:32:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:29,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377586867] [2020-10-27 01:32:29,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:29,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:32:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623505643] [2020-10-27 01:32:29,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:32:29,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:32:29,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:32:29,668 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 25 states. [2020-10-27 01:32:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:31,748 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-27 01:32:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:32:31,749 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-27 01:32:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:31,750 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:32:31,750 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:32:31,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:32:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:32:31,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 01:32:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:32:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-27 01:32:31,761 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 54 [2020-10-27 01:32:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:31,761 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-27 01:32:31,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:32:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-27 01:32:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:32:31,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:31,762 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:31,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:32:31,763 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:31,763 INFO L82 PathProgramCache]: Analyzing trace with hash 954953849, now seen corresponding path program 22 times [2020-10-27 01:32:31,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:31,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171218100] [2020-10-27 01:32:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:32,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:32,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:32:32,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:32,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-27 01:32:32,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:32:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:32:32,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:32,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:33,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:33,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:33,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:33,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:32:33,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:33,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:32:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:33,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171218100] [2020-10-27 01:32:33,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:33,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:32:33,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997537706] [2020-10-27 01:32:33,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:32:33,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:32:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:32:33,031 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 26 states. [2020-10-27 01:32:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:35,150 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-27 01:32:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:32:35,151 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 01:32:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:35,152 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:32:35,152 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:32:35,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:32:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:32:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 01:32:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:32:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-27 01:32:35,165 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 56 [2020-10-27 01:32:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:35,165 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-27 01:32:35,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:32:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-27 01:32:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:32:35,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:35,166 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:35,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:32:35,167 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:35,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1696487234, now seen corresponding path program 23 times [2020-10-27 01:32:35,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:35,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971946893] [2020-10-27 01:32:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:35,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:35,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:35,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:32:35,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:35,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-27 01:32:35,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:32:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:32:35,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:36,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:36,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:36,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:36,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:36,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:36,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:36,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:36,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:36,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:36,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:36,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:36,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971946893] [2020-10-27 01:32:36,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:36,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:32:36,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891446393] [2020-10-27 01:32:36,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:32:36,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:36,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:32:36,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:32:36,402 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 27 states. [2020-10-27 01:32:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:38,728 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-10-27 01:32:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:32:38,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 01:32:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:38,730 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:32:38,730 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:32:38,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:32:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:32:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 01:32:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:32:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-27 01:32:38,742 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 58 [2020-10-27 01:32:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:38,743 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-27 01:32:38,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:32:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-27 01:32:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:32:38,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:38,744 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:38,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:32:38,744 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1602181520, now seen corresponding path program 12 times [2020-10-27 01:32:38,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:38,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550962210] [2020-10-27 01:32:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:39,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:39,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:32:39,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-27 01:32:39,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:32:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:32:39,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:40,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:40,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:40,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:40,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:40,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:40,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:40,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:40,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:40,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:40,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:40,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:40,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550962210] [2020-10-27 01:32:40,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:40,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:32:40,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403569393] [2020-10-27 01:32:40,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:32:40,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:40,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:32:40,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:32:40,109 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 27 states. [2020-10-27 01:32:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:42,526 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-10-27 01:32:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:32:42,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 01:32:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:42,528 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:32:42,528 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:32:42,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:32:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:32:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 01:32:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 01:32:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-27 01:32:42,541 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 58 [2020-10-27 01:32:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:42,541 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-27 01:32:42,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:32:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-27 01:32:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:32:42,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:42,542 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:42,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:32:42,542 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1479205827, now seen corresponding path program 24 times [2020-10-27 01:32:42,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:42,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765984675] [2020-10-27 01:32:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:42,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:43,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:43,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:32:43,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-27 01:32:43,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:32:43,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:43,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:32:43,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:43,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:43,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:43,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:43,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:43,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:43,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:43,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:43,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:43,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765984675] [2020-10-27 01:32:43,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:43,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:32:43,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967058993] [2020-10-27 01:32:43,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:32:43,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:43,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:32:43,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:32:43,714 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 28 states. [2020-10-27 01:32:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:46,160 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2020-10-27 01:32:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:32:46,160 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-27 01:32:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:46,162 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:32:46,162 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:32:46,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:32:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:32:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 01:32:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:32:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-27 01:32:46,174 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 60 [2020-10-27 01:32:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:46,174 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-27 01:32:46,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:32:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-27 01:32:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:32:46,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:46,175 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:46,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:32:46,175 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash -401510008, now seen corresponding path program 25 times [2020-10-27 01:32:46,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:46,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776198935] [2020-10-27 01:32:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:46,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:46,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:46,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:32:46,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-27 01:32:46,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:32:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:32:46,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:47,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:47,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:47,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:47,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776198935] [2020-10-27 01:32:47,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:47,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:32:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120764318] [2020-10-27 01:32:47,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:32:47,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:32:47,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:32:47,691 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 29 states. [2020-10-27 01:32:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:50,315 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-10-27 01:32:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:32:50,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 01:32:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:50,317 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:32:50,317 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:32:50,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:32:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:32:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 01:32:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:32:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-27 01:32:50,329 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 62 [2020-10-27 01:32:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:50,329 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-27 01:32:50,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:32:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-27 01:32:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:32:50,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:50,330 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:50,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:32:50,331 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1066472662, now seen corresponding path program 13 times [2020-10-27 01:32:50,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:50,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951260329] [2020-10-27 01:32:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:50,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:51,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:32:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:51,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:52,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951260329] [2020-10-27 01:32:52,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:52,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:32:52,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310977286] [2020-10-27 01:32:52,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:32:52,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:52,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:32:52,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:32:52,005 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 29 states. [2020-10-27 01:32:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:54,886 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2020-10-27 01:32:54,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:32:54,887 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 01:32:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:54,888 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:32:54,889 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:32:54,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:32:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:32:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 01:32:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:32:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-27 01:32:54,902 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 62 [2020-10-27 01:32:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:54,902 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-27 01:32:54,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:32:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-27 01:32:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:32:54,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:54,903 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:54,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:32:54,903 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:54,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:54,904 INFO L82 PathProgramCache]: Analyzing trace with hash 411804173, now seen corresponding path program 26 times [2020-10-27 01:32:54,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:54,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296025778] [2020-10-27 01:32:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:54,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:55,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:55,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:32:55,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-27 01:32:55,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:32:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:32:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:32:55,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:56,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:32:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:56,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:32:56,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:32:56,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:32:56,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:32:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:32:56,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:32:56,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:32:56,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:32:56,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:32:56,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:32:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:32:56,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296025778] [2020-10-27 01:32:56,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:32:56,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:32:56,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577272320] [2020-10-27 01:32:56,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:32:56,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:32:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:32:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:32:56,559 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 30 states. [2020-10-27 01:32:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:32:59,367 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2020-10-27 01:32:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:32:59,369 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-27 01:32:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:32:59,370 INFO L225 Difference]: With dead ends: 127 [2020-10-27 01:32:59,370 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:32:59,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:32:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:32:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 01:32:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:32:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-27 01:32:59,385 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 64 [2020-10-27 01:32:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:32:59,385 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-27 01:32:59,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:32:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-27 01:32:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:32:59,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:32:59,386 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:32:59,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:32:59,387 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:32:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:32:59,387 INFO L82 PathProgramCache]: Analyzing trace with hash 322684242, now seen corresponding path program 27 times [2020-10-27 01:32:59,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:32:59,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293467507] [2020-10-27 01:32:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:32:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:32:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:33:00,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:00,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:00,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:00,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:00,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:00,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:00,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:00,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:00,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:00,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:00,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293467507] [2020-10-27 01:33:00,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:00,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:33:00,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125967714] [2020-10-27 01:33:00,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:33:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:33:00,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:33:00,955 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 31 states. [2020-10-27 01:33:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:03,939 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-10-27 01:33:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:33:03,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 01:33:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:03,941 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:33:03,941 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:33:03,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:33:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:33:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 01:33:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:33:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-27 01:33:03,954 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 66 [2020-10-27 01:33:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:03,954 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-27 01:33:03,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:33:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-27 01:33:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:33:03,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:03,955 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:03,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:33:03,955 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash -30950116, now seen corresponding path program 14 times [2020-10-27 01:33:03,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:03,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059411401] [2020-10-27 01:33:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:03,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:04,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:04,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:33:04,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-27 01:33:04,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:33:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:33:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:05,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:05,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:05,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:05,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:05,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:05,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:05,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:05,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:05,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:05,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059411401] [2020-10-27 01:33:05,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:05,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:33:05,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480606867] [2020-10-27 01:33:05,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:33:05,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:05,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:33:05,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:33:05,573 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 31 states. [2020-10-27 01:33:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:08,799 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-27 01:33:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:33:08,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 01:33:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:08,801 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:33:08,801 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:33:08,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:33:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:33:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 01:33:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:33:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-27 01:33:08,815 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 66 [2020-10-27 01:33:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:08,815 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-27 01:33:08,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:33:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-27 01:33:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:33:08,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:08,816 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:08,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:33:08,816 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash 577776471, now seen corresponding path program 28 times [2020-10-27 01:33:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:08,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396173626] [2020-10-27 01:33:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:08,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:09,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:09,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:33:09,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:09,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-27 01:33:09,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:33:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:33:09,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:10,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:10,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:10,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:10,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:10,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:10,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:10,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:10,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:10,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396173626] [2020-10-27 01:33:10,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:10,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:33:10,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75971324] [2020-10-27 01:33:10,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:33:10,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:10,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:33:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:33:10,541 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 32 states. [2020-10-27 01:33:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:13,692 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-10-27 01:33:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:33:13,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-27 01:33:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:13,694 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:33:13,694 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:33:13,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:33:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:33:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-27 01:33:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 01:33:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-27 01:33:13,706 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 68 [2020-10-27 01:33:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:13,706 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-27 01:33:13,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:33:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-27 01:33:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:33:13,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:13,707 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:13,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:33:13,707 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash 908272668, now seen corresponding path program 29 times [2020-10-27 01:33:13,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:13,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374779783] [2020-10-27 01:33:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:13,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:14,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:14,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:33:14,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:14,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-27 01:33:14,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:33:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:14,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:33:14,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:15,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:15,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:15,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:15,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:15,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:15,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:15,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:15,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:15,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:15,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:15,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:15,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374779783] [2020-10-27 01:33:15,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:15,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:33:15,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908138787] [2020-10-27 01:33:15,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:33:15,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:33:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:33:15,509 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 33 states. [2020-10-27 01:33:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:18,881 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-10-27 01:33:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:33:18,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 01:33:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:18,883 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:33:18,883 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:33:18,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:33:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:33:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-27 01:33:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:33:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-27 01:33:18,897 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 70 [2020-10-27 01:33:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:18,898 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-27 01:33:18,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:33:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-27 01:33:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:33:18,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:18,899 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:18,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:33:18,899 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash -989539742, now seen corresponding path program 15 times [2020-10-27 01:33:18,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:18,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109206612] [2020-10-27 01:33:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:18,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:19,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:19,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:33:19,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:19,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-27 01:33:19,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:19,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:33:19,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:19,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:33:19,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:20,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:20,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:20,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:20,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:20,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:20,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:20,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:20,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:20,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109206612] [2020-10-27 01:33:20,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:20,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:33:20,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393879364] [2020-10-27 01:33:20,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:33:20,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:33:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:33:20,660 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 33 states. [2020-10-27 01:33:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:24,373 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-10-27 01:33:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:33:24,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 01:33:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:24,375 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:33:24,375 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:33:24,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:33:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:33:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-27 01:33:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 01:33:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-27 01:33:24,388 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 70 [2020-10-27 01:33:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:24,388 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-27 01:33:24,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:33:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-27 01:33:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:33:24,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:24,389 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:24,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:33:24,389 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 687538081, now seen corresponding path program 30 times [2020-10-27 01:33:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:24,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686902590] [2020-10-27 01:33:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:24,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:25,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:25,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:33:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:26,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:26,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:26,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:26,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:26,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686902590] [2020-10-27 01:33:26,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:26,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:33:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787539045] [2020-10-27 01:33:26,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:33:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:33:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:33:26,264 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 34 states. [2020-10-27 01:33:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:29,835 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2020-10-27 01:33:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:33:29,836 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-27 01:33:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:29,837 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:33:29,837 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:33:29,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:33:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:33:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-27 01:33:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:33:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-10-27 01:33:29,850 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 72 [2020-10-27 01:33:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:29,850 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-10-27 01:33:29,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:33:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-10-27 01:33:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:33:29,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:29,851 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:29,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:33:29,852 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash -985002522, now seen corresponding path program 31 times [2020-10-27 01:33:29,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:29,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590208593] [2020-10-27 01:33:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:29,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:31,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:31,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:33:31,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:31,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-27 01:33:31,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:33:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:33:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:32,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:32,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:32,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:32,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:32,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:32,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:32,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:32,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:32,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:32,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:32,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590208593] [2020-10-27 01:33:32,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:32,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:33:32,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055965026] [2020-10-27 01:33:32,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:33:32,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:32,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:33:32,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:33:32,190 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 35 states. [2020-10-27 01:33:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:35,968 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2020-10-27 01:33:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:33:35,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 01:33:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:35,970 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:33:35,970 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:33:35,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:33:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:33:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-27 01:33:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 01:33:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-27 01:33:35,981 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 74 [2020-10-27 01:33:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:35,982 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-27 01:33:35,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:33:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-27 01:33:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:33:35,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:35,983 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:35,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:33:35,983 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash 19518632, now seen corresponding path program 16 times [2020-10-27 01:33:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865987589] [2020-10-27 01:33:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:36,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:33:36,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:37,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:37,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:37,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:37,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:37,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:37,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:37,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:37,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:37,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865987589] [2020-10-27 01:33:37,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:37,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:33:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101989563] [2020-10-27 01:33:37,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:33:37,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:33:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:33:37,900 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 35 states. [2020-10-27 01:33:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:42,088 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-10-27 01:33:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:33:42,088 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 01:33:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:42,090 INFO L225 Difference]: With dead ends: 149 [2020-10-27 01:33:42,090 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 01:33:42,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:33:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 01:33:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-27 01:33:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:33:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-27 01:33:42,105 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 74 [2020-10-27 01:33:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:42,105 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-27 01:33:42,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:33:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-27 01:33:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:33:42,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:42,106 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:42,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:33:42,106 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1978753301, now seen corresponding path program 32 times [2020-10-27 01:33:42,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:42,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667047078] [2020-10-27 01:33:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:43,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:43,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:33:43,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:43,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-27 01:33:43,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:33:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:33:43,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:44,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:44,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:44,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667047078] [2020-10-27 01:33:44,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:44,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:33:44,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897678836] [2020-10-27 01:33:44,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:33:44,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:44,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:33:44,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:33:44,408 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 36 states. [2020-10-27 01:33:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:48,388 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-10-27 01:33:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:33:48,389 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-27 01:33:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:48,390 INFO L225 Difference]: With dead ends: 151 [2020-10-27 01:33:48,391 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:33:48,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:33:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:33:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-27 01:33:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:33:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-27 01:33:48,405 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 76 [2020-10-27 01:33:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:48,406 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-27 01:33:48,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:33:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-27 01:33:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:33:48,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:48,407 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:48,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:33:48,407 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:48,408 INFO L82 PathProgramCache]: Analyzing trace with hash 804455088, now seen corresponding path program 33 times [2020-10-27 01:33:48,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:48,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070680385] [2020-10-27 01:33:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:49,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:49,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:33:49,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 912 [2020-10-27 01:33:49,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:33:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:33:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:50,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:50,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:50,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:50,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070680385] [2020-10-27 01:33:50,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:50,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:33:50,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724539418] [2020-10-27 01:33:50,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:33:50,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:33:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:33:50,560 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 37 states. [2020-10-27 01:33:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:33:54,744 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-27 01:33:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:33:54,744 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 01:33:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:33:54,746 INFO L225 Difference]: With dead ends: 153 [2020-10-27 01:33:54,746 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:33:54,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:33:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:33:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-27 01:33:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:33:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-27 01:33:54,761 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 78 [2020-10-27 01:33:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:33:54,761 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-27 01:33:54,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:33:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-27 01:33:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:33:54,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:33:54,763 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:33:54,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:33:54,763 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:33:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:33:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1026014226, now seen corresponding path program 17 times [2020-10-27 01:33:54,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:33:54,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764965514] [2020-10-27 01:33:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:33:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:54,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:55,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:55,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:33:55,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-27 01:33:55,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:33:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:33:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:33:55,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:56,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:33:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:33:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:33:56,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:33:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:33:56,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764965514] [2020-10-27 01:33:56,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:33:56,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:33:56,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077311295] [2020-10-27 01:33:56,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:33:56,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:33:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:33:56,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:33:56,949 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 37 states. [2020-10-27 01:34:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:01,663 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2020-10-27 01:34:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:34:01,664 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 01:34:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:01,665 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:34:01,665 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:34:01,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:34:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:34:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-27 01:34:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 01:34:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-27 01:34:01,676 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 78 [2020-10-27 01:34:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:01,677 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-27 01:34:01,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:34:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-27 01:34:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:34:01,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:01,677 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:01,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:34:01,678 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -296908491, now seen corresponding path program 34 times [2020-10-27 01:34:01,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:01,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066687700] [2020-10-27 01:34:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:01,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:02,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:34:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:04,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:04,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:04,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:04,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:04,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:04,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:04,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:04,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066687700] [2020-10-27 01:34:04,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:04,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:34:04,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734608236] [2020-10-27 01:34:04,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:34:04,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:04,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:34:04,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:34:04,088 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 38 states. [2020-10-27 01:34:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:08,566 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-10-27 01:34:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:34:08,567 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-27 01:34:08,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:08,569 INFO L225 Difference]: With dead ends: 159 [2020-10-27 01:34:08,569 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:34:08,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:34:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:34:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-27 01:34:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:34:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2020-10-27 01:34:08,581 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 80 [2020-10-27 01:34:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:08,581 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2020-10-27 01:34:08,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:34:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2020-10-27 01:34:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:34:08,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:08,583 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:08,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:34:08,583 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2145353094, now seen corresponding path program 35 times [2020-10-27 01:34:08,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:08,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328230833] [2020-10-27 01:34:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:08,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:09,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:09,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:34:09,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:09,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-27 01:34:09,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:09,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:34:09,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:09,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:34:09,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:11,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:11,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:11,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:11,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:11,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:11,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:11,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:11,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:11,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:11,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:11,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:11,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328230833] [2020-10-27 01:34:11,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:11,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:34:11,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679217247] [2020-10-27 01:34:11,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:34:11,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:34:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:34:11,100 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 39 states. [2020-10-27 01:34:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:15,710 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2020-10-27 01:34:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:34:15,710 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 01:34:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:15,712 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:34:15,712 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 01:34:15,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:34:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 01:34:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-27 01:34:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 01:34:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-27 01:34:15,723 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 82 [2020-10-27 01:34:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:15,723 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-27 01:34:15,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:34:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-27 01:34:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:34:15,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:15,724 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:15,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:34:15,724 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:15,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash 496082996, now seen corresponding path program 18 times [2020-10-27 01:34:15,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:15,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091960243] [2020-10-27 01:34:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:15,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:16,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:16,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:34:16,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:16,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-27 01:34:16,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:34:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:16,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:34:16,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:18,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:18,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:18,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:18,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:18,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:18,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:18,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:18,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:18,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091960243] [2020-10-27 01:34:18,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:18,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:34:18,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719304212] [2020-10-27 01:34:18,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:34:18,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:34:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:34:18,090 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 39 states. [2020-10-27 01:34:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:23,292 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-10-27 01:34:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:34:23,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 01:34:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:23,294 INFO L225 Difference]: With dead ends: 165 [2020-10-27 01:34:23,295 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:34:23,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:34:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:34:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-27 01:34:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 01:34:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-27 01:34:23,310 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 82 [2020-10-27 01:34:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:23,310 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-27 01:34:23,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:34:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-27 01:34:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:34:23,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:23,311 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:23,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:34:23,311 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:23,312 INFO L82 PathProgramCache]: Analyzing trace with hash -384156033, now seen corresponding path program 36 times [2020-10-27 01:34:23,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:23,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947896120] [2020-10-27 01:34:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:23,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:24,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:34:24,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:24,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-27 01:34:24,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:34:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:34:24,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:25,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:25,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:25,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:26,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947896120] [2020-10-27 01:34:26,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:26,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:34:26,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614274482] [2020-10-27 01:34:26,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:34:26,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:26,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:34:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:34:26,002 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 40 states. [2020-10-27 01:34:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:30,969 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2020-10-27 01:34:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:34:30,970 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-27 01:34:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:30,971 INFO L225 Difference]: With dead ends: 167 [2020-10-27 01:34:30,971 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 01:34:30,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:34:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 01:34:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-27 01:34:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 01:34:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-10-27 01:34:30,982 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 84 [2020-10-27 01:34:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:30,983 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-10-27 01:34:30,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:34:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-10-27 01:34:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:34:30,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:30,983 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:30,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:34:30,983 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash -90895036, now seen corresponding path program 37 times [2020-10-27 01:34:30,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:30,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821552308] [2020-10-27 01:34:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:31,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:32,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1177 [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:34:32,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:33,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:33,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:33,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:33,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:33,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821552308] [2020-10-27 01:34:33,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:33,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:34:33,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475564582] [2020-10-27 01:34:33,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:34:33,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:34:33,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:34:33,705 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 41 states. [2020-10-27 01:34:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:38,904 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-10-27 01:34:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:34:38,905 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 01:34:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:38,907 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:34:38,907 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:34:38,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:34:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:34:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-27 01:34:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 01:34:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-10-27 01:34:38,922 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 86 [2020-10-27 01:34:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:38,922 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-10-27 01:34:38,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:34:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-10-27 01:34:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:34:38,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:38,923 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:38,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:34:38,923 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2011731590, now seen corresponding path program 19 times [2020-10-27 01:34:38,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:38,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935218814] [2020-10-27 01:34:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:40,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:40,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:34:40,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:40,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-27 01:34:40,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:34:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:34:40,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:41,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:41,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:41,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:41,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:41,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:41,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:41,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:41,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:41,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935218814] [2020-10-27 01:34:41,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:41,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:34:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50972655] [2020-10-27 01:34:41,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:34:41,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:41,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:34:41,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:34:41,509 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 41 states. [2020-10-27 01:34:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:47,217 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2020-10-27 01:34:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:34:47,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 01:34:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:47,220 INFO L225 Difference]: With dead ends: 173 [2020-10-27 01:34:47,220 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:34:47,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:34:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:34:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-27 01:34:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 01:34:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-27 01:34:47,236 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 86 [2020-10-27 01:34:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:47,236 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-27 01:34:47,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:34:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-27 01:34:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:34:47,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:47,237 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:47,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:34:47,238 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:47,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1734918455, now seen corresponding path program 38 times [2020-10-27 01:34:47,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:47,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454531727] [2020-10-27 01:34:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:47,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:34:48,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:50,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:50,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:50,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:50,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:50,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:50,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:34:50,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:50,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:50,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454531727] [2020-10-27 01:34:50,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:50,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:34:50,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484481991] [2020-10-27 01:34:50,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:34:50,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:34:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:34:50,558 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 42 states. [2020-10-27 01:34:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:55,919 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2020-10-27 01:34:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:34:55,920 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-27 01:34:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:55,922 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:34:55,922 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:34:55,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:34:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:34:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-27 01:34:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 01:34:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-10-27 01:34:55,938 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 88 [2020-10-27 01:34:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:55,938 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-10-27 01:34:55,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:34:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-10-27 01:34:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:34:55,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:55,939 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:55,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:34:55,939 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1093459186, now seen corresponding path program 39 times [2020-10-27 01:34:55,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:55,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119555629] [2020-10-27 01:34:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:57,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:34:57,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:58,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:58,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:58,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:58,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:58,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119555629] [2020-10-27 01:34:58,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:58,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:34:58,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075741467] [2020-10-27 01:34:58,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:34:58,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:34:58,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:34:58,823 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 43 states. [2020-10-27 01:35:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:04,462 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-10-27 01:35:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:35:04,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 01:35:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:04,464 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:35:04,465 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:35:04,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:35:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:35:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-10-27 01:35:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-27 01:35:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-10-27 01:35:04,478 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 90 [2020-10-27 01:35:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:04,478 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-10-27 01:35:04,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:35:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-10-27 01:35:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:35:04,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:04,479 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:04,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:35:04,479 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:04,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1013653440, now seen corresponding path program 20 times [2020-10-27 01:35:04,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:04,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832801673] [2020-10-27 01:35:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:04,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:05,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:05,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:35:05,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-27 01:35:05,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:35:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:35:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:07,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:07,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:07,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:07,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:07,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:07,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:07,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:07,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:07,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:07,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:07,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832801673] [2020-10-27 01:35:07,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:07,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:35:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885246243] [2020-10-27 01:35:07,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:35:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:35:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:35:07,292 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 43 states. [2020-10-27 01:35:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:13,621 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2020-10-27 01:35:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:35:13,622 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 01:35:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:13,623 INFO L225 Difference]: With dead ends: 181 [2020-10-27 01:35:13,623 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:35:13,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:35:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:35:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-27 01:35:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 01:35:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-27 01:35:13,640 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 90 [2020-10-27 01:35:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:13,640 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-27 01:35:13,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:35:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-27 01:35:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:35:13,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:13,641 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:13,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:35:13,642 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1168574995, now seen corresponding path program 40 times [2020-10-27 01:35:13,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:13,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421391748] [2020-10-27 01:35:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:13,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:15,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:35:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:16,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:16,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:16,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:16,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:16,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:16,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:16,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:16,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:16,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:16,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421391748] [2020-10-27 01:35:16,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:16,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:35:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329156057] [2020-10-27 01:35:16,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:35:16,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:35:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:35:16,810 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 44 states. [2020-10-27 01:35:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:22,844 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-10-27 01:35:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:35:22,845 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-27 01:35:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:22,847 INFO L225 Difference]: With dead ends: 183 [2020-10-27 01:35:22,847 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 01:35:22,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:35:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 01:35:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-27 01:35:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 01:35:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2020-10-27 01:35:22,863 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 92 [2020-10-27 01:35:22,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:22,864 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2020-10-27 01:35:22,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:35:22,864 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2020-10-27 01:35:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 01:35:22,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:22,865 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:22,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:35:22,865 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1729971160, now seen corresponding path program 41 times [2020-10-27 01:35:22,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:22,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041931603] [2020-10-27 01:35:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1514 [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:24,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:35:24,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:26,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:26,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:26,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:26,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:26,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:26,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:26,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:26,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041931603] [2020-10-27 01:35:26,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:26,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:35:26,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715378345] [2020-10-27 01:35:26,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:35:26,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:26,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:35:26,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:35:26,248 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 45 states.