/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:43:27,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:43:27,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:43:27,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:43:27,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:43:27,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:43:27,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:43:27,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:43:27,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:43:27,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:43:27,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:43:27,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:43:27,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:43:27,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:43:27,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:43:27,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:43:27,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:43:27,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:43:27,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:43:27,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:43:27,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:43:27,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:43:27,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:43:27,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:43:27,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:43:27,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:43:27,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:43:27,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:43:27,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:43:27,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:43:27,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:43:27,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:43:27,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:43:27,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:43:27,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:43:27,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:43:27,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:43:27,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:43:27,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:43:27,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:43:27,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:43:27,275 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 [2020-10-12 09:43:27,319 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:43:27,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:43:27,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:43:27,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:43:27,321 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:43:27,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:43:27,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:43:27,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:43:27,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:43:27,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:43:27,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:43:27,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:43:27,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:43:27,324 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:43:27,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:43:27,324 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:43:27,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:43:27,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:43:27,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:43:27,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:43:27,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:43:27,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:43:27,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:43:27,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:43:27,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:43:27,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:43:27,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:43:27,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:43:27,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:43:27,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:43:27,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:43:27,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:43:27,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:43:27,640 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:43:27,641 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:43:27,641 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2020-10-12 09:43:27,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f01c26610/4dd251cd988a4846aa86ceee757dc6ac/FLAG0a0bbb722 [2020-10-12 09:43:28,278 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:43:28,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/relax-2.i [2020-10-12 09:43:28,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f01c26610/4dd251cd988a4846aa86ceee757dc6ac/FLAG0a0bbb722 [2020-10-12 09:43:28,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f01c26610/4dd251cd988a4846aa86ceee757dc6ac [2020-10-12 09:43:28,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:43:28,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:43:28,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:28,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:43:28,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:43:28,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:28" (1/1) ... [2020-10-12 09:43:28,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106b6e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:28, skipping insertion in model container [2020-10-12 09:43:28,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:28" (1/1) ... [2020-10-12 09:43:28,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:43:28,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:43:29,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:29,190 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:43:29,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:29,289 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:43:29,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29 WrapperNode [2020-10-12 09:43:29,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:29,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:43:29,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:43:29,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:43:29,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... [2020-10-12 09:43:29,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... [2020-10-12 09:43:29,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... [2020-10-12 09:43:29,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... [2020-10-12 09:43:29,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... [2020-10-12 09:43:29,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... [2020-10-12 09:43:29,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... [2020-10-12 09:43:29,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:43:29,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:43:29,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:43:29,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:43:29,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:43:29,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:43:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:43:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:43:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:43:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 09:43:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 09:43:29,432 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2020-10-12 09:43:29,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:43:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-10-12 09:43:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:43:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:43:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:43:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:43:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:43:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 09:43:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 09:43:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 09:43:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 09:43:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 09:43:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 09:43:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 09:43:29,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 09:43:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 09:43:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 09:43:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 09:43:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 09:43:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 09:43:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 09:43:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 09:43:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 09:43:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 09:43:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 09:43:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 09:43:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 09:43:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 09:43:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 09:43:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 09:43:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 09:43:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 09:43:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 09:43:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 09:43:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 09:43:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 09:43:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 09:43:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 09:43:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 09:43:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 09:43:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 09:43:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 09:43:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 09:43:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 09:43:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 09:43:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 09:43:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 09:43:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 09:43:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 09:43:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 09:43:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 09:43:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 09:43:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 09:43:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 09:43:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 09:43:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 09:43:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 09:43:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 09:43:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 09:43:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 09:43:29,447 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 09:43:29,447 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 09:43:29,448 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 09:43:29,448 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 09:43:29,449 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 09:43:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 09:43:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 09:43:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 09:43:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 09:43:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 09:43:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 09:43:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 09:43:29,452 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 09:43:29,452 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 09:43:29,452 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 09:43:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 09:43:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 09:43:29,453 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 09:43:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 09:43:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 09:43:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 09:43:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 09:43:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 09:43:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 09:43:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 09:43:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 09:43:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 09:43:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 09:43:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 09:43:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 09:43:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 09:43:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 09:43:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 09:43:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 09:43:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 09:43:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 09:43:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 09:43:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 09:43:29,456 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 09:43:29,457 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 09:43:29,458 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 09:43:29,458 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2020-10-12 09:43:29,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:43:29,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:43:29,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 09:43:29,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:43:29,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:43:29,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:43:29,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:43:30,094 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:43:30,094 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 09:43:30,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:30 BoogieIcfgContainer [2020-10-12 09:43:30,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:43:30,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:43:30,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:43:30,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:43:30,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:43:28" (1/3) ... [2020-10-12 09:43:30,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640f4f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:30, skipping insertion in model container [2020-10-12 09:43:30,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:29" (2/3) ... [2020-10-12 09:43:30,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640f4f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:30, skipping insertion in model container [2020-10-12 09:43:30,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:30" (3/3) ... [2020-10-12 09:43:30,114 INFO L109 eAbstractionObserver]: Analyzing ICFG relax-2.i [2020-10-12 09:43:30,126 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:43:30,136 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:43:30,151 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:43:30,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:43:30,185 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:43:30,185 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:43:30,185 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:43:30,195 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:43:30,195 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:43:30,196 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:43:30,196 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:43:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-12 09:43:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 09:43:30,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:30,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:30,236 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash 15551313, now seen corresponding path program 1 times [2020-10-12 09:43:30,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:30,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692143534] [2020-10-12 09:43:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:30,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:30,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:30,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:30,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 09:43:30,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:30,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-12 09:43:30,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:43:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:43:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:43:30,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:43:31,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:31,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:31,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:31,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:31,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:31,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 09:43:31,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:31,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:31,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 09:43:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:31,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:31,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:31,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:43:31,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 09:43:31,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:43:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 09:43:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:31,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692143534] [2020-10-12 09:43:31,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:31,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 09:43:31,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658196577] [2020-10-12 09:43:31,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:43:31,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:43:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:43:31,262 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 5 states. [2020-10-12 09:43:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:31,556 INFO L93 Difference]: Finished difference Result 111 states and 168 transitions. [2020-10-12 09:43:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:43:31,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-12 09:43:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:31,569 INFO L225 Difference]: With dead ends: 111 [2020-10-12 09:43:31,569 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:43:31,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:43:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 09:43:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:43:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2020-10-12 09:43:31,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 19 [2020-10-12 09:43:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:31,625 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2020-10-12 09:43:31,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:43:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2020-10-12 09:43:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 09:43:31,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:31,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:31,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:43:31,628 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1675761359, now seen corresponding path program 1 times [2020-10-12 09:43:31,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:31,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467172671] [2020-10-12 09:43:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:31,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:31,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:32,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:32,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 09:43:32,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:43:32,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-12 09:43:32,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 09:43:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:43:32,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:32,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:32,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:32,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:32,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:32,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:32,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:32,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:32,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 09:43:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:32,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:32,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 09:43:32,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:32,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 09:43:32,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:32,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:32,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:32,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:43:32,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:32,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467172671] [2020-10-12 09:43:32,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:32,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 09:43:32,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295186599] [2020-10-12 09:43:32,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:43:32,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:43:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:32,591 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 8 states. [2020-10-12 09:43:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:33,014 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-10-12 09:43:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:43:33,014 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-12 09:43:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:33,016 INFO L225 Difference]: With dead ends: 66 [2020-10-12 09:43:33,016 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:43:33,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:43:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:43:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-12 09:43:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 09:43:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2020-10-12 09:43:33,030 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 21 [2020-10-12 09:43:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:33,031 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2020-10-12 09:43:33,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:43:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2020-10-12 09:43:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:43:33,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:33,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:33,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:43:33,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:33,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1479905846, now seen corresponding path program 1 times [2020-10-12 09:43:33,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:33,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880698249] [2020-10-12 09:43:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:33,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:33,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:33,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:33,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:33,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 09:43:33,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-12 09:43:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:43:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:43:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:33,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:33,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:33,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:33,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:33,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:33,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:33,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 09:43:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:33,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:33,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:33,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:43:33,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:33,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 09:43:33,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:33,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:33,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:43:33,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:43:33,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:33,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880698249] [2020-10-12 09:43:33,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:33,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 09:43:33,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235641330] [2020-10-12 09:43:33,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:43:33,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:33,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:43:33,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:43:33,555 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand 7 states. [2020-10-12 09:43:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:33,929 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2020-10-12 09:43:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:33,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 09:43:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:33,933 INFO L225 Difference]: With dead ends: 117 [2020-10-12 09:43:33,933 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 09:43:33,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 09:43:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-12 09:43:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:43:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-12 09:43:33,949 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 22 [2020-10-12 09:43:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:33,950 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-12 09:43:33,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:43:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-12 09:43:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:43:33,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:33,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:33,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:43:33,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:33,952 INFO L82 PathProgramCache]: Analyzing trace with hash -656885300, now seen corresponding path program 1 times [2020-10-12 09:43:33,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:33,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249543583] [2020-10-12 09:43:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:34,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:34,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:34,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:43:34,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:34,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-12 09:43:34,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 09:43:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:34,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:34,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:34,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:34,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:34,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:34,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:34,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:34,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:34,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 09:43:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:34,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:34,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:34,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:43:34,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:34,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 09:43:34,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:43:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:43:34,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:35,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249543583] [2020-10-12 09:43:35,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:35,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:35,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508437418] [2020-10-12 09:43:35,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:35,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:35,004 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 10 states. [2020-10-12 09:43:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:35,691 INFO L93 Difference]: Finished difference Result 159 states and 217 transitions. [2020-10-12 09:43:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:43:35,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 09:43:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:35,694 INFO L225 Difference]: With dead ends: 159 [2020-10-12 09:43:35,694 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:43:35,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:43:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:43:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 90. [2020-10-12 09:43:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 09:43:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2020-10-12 09:43:35,714 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 24 [2020-10-12 09:43:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:35,714 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2020-10-12 09:43:35,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2020-10-12 09:43:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:43:35,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:35,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:35,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:43:35,717 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash -510581374, now seen corresponding path program 1 times [2020-10-12 09:43:35,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:35,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146474523] [2020-10-12 09:43:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:35,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:35,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:35,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:43:35,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-12 09:43:35,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:43:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:43:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:43:35,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:35,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:35,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:35,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:35,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:35,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:35,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:35,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:35,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:35,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 09:43:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:35,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:35,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 09:43:35,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:35,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 09:43:35,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:35,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:43:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:43:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:35,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146474523] [2020-10-12 09:43:35,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:35,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 09:43:35,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013744471] [2020-10-12 09:43:35,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:43:35,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:35,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:43:35,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:43:35,913 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand 5 states. [2020-10-12 09:43:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:36,070 INFO L93 Difference]: Finished difference Result 105 states and 140 transitions. [2020-10-12 09:43:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:43:36,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-12 09:43:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:36,072 INFO L225 Difference]: With dead ends: 105 [2020-10-12 09:43:36,072 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:43:36,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:43:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-12 09:43:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 09:43:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2020-10-12 09:43:36,085 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 24 [2020-10-12 09:43:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:36,085 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2020-10-12 09:43:36,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:43:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2020-10-12 09:43:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:43:36,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:36,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:36,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:43:36,087 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:36,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:36,088 INFO L82 PathProgramCache]: Analyzing trace with hash -8123058, now seen corresponding path program 2 times [2020-10-12 09:43:36,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:36,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148180581] [2020-10-12 09:43:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:36,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:36,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:37,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:37,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:43:37,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:43:37,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-12 09:43:37,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:43:37,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:37,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:37,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:37,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:37,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:37,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:37,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:37,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:37,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:37,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:37,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:43:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:37,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:37,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:37,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:43:37,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:43:37,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 09:43:37,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:37,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:37,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:37,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:43:37,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:37,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148180581] [2020-10-12 09:43:37,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:37,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:37,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216070460] [2020-10-12 09:43:37,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:37,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:37,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:37,390 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand 10 states. [2020-10-12 09:43:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:38,187 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2020-10-12 09:43:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:43:38,188 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 09:43:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:38,189 INFO L225 Difference]: With dead ends: 154 [2020-10-12 09:43:38,189 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 09:43:38,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:43:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 09:43:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-10-12 09:43:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 09:43:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2020-10-12 09:43:38,219 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 26 [2020-10-12 09:43:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:38,220 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2020-10-12 09:43:38,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2020-10-12 09:43:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:43:38,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:38,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:38,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:43:38,225 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1933285185, now seen corresponding path program 1 times [2020-10-12 09:43:38,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:38,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397698965] [2020-10-12 09:43:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:38,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:38,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:38,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:43:38,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:38,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-12 09:43:38,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:38,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:43:38,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:43:38,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 09:43:38,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:38,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:38,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:38,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:38,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:38,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:38,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:38,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:38,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 09:43:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:38,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:38,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:38,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 09:43:38,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:38,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 09:43:38,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:38,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:43:38,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 09:43:38,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 09:43:38,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:43:38,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397698965] [2020-10-12 09:43:38,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:38,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:43:38,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207962286] [2020-10-12 09:43:38,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:43:38,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:43:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:43:38,371 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 4 states. [2020-10-12 09:43:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:38,519 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2020-10-12 09:43:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:43:38,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-12 09:43:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:38,521 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:43:38,521 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 09:43:38,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:43:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 09:43:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-10-12 09:43:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:43:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2020-10-12 09:43:38,542 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 26 [2020-10-12 09:43:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:38,544 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2020-10-12 09:43:38,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:43:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2020-10-12 09:43:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:43:38,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:38,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:38,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:43:38,550 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -844238351, now seen corresponding path program 1 times [2020-10-12 09:43:38,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:38,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032508706] [2020-10-12 09:43:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:38,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:38,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:38,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:40,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:40,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:43:40,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:40,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2268 [2020-10-12 09:43:40,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:43:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:43:40,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:40,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:40,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:40,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:40,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:40,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:40,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:40,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:40,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:40,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:40,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:40,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:40,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 09:43:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:40,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:41,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:41,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 09:43:41,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:43:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 09:43:41,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:43:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:43:41,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:41,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032508706] [2020-10-12 09:43:41,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:41,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:43:41,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119992863] [2020-10-12 09:43:41,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:43:41,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:41,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:43:41,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:43:41,124 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand 9 states. [2020-10-12 09:43:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:41,634 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2020-10-12 09:43:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:43:41,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-12 09:43:41,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:41,636 INFO L225 Difference]: With dead ends: 125 [2020-10-12 09:43:41,636 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:43:41,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:43:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:43:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-12 09:43:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 09:43:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2020-10-12 09:43:41,657 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 27 [2020-10-12 09:43:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:41,657 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2020-10-12 09:43:41,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:43:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2020-10-12 09:43:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:43:41,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:41,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:41,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:43:41,659 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -842391309, now seen corresponding path program 1 times [2020-10-12 09:43:41,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:41,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990011972] [2020-10-12 09:43:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:41,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:41,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:42,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:43,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:43,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:43:43,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:43:43,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1576 [2020-10-12 09:43:43,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:43:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:43:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:43:43,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:43,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:43,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:43,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:43,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:43,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:43,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 09:43:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:43,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:43,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:43,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 09:43:43,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:43:43,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-12 09:43:43,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:43:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:43:43,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:43:43,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990011972] [2020-10-12 09:43:43,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:43,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 09:43:43,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934957213] [2020-10-12 09:43:43,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:43:43,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:43,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:43:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:43:43,401 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 7 states. [2020-10-12 09:43:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:43,663 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2020-10-12 09:43:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:43,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-12 09:43:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:43,668 INFO L225 Difference]: With dead ends: 101 [2020-10-12 09:43:43,668 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 09:43:43,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 09:43:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-10-12 09:43:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 09:43:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-12 09:43:43,684 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 27 [2020-10-12 09:43:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:43,685 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-12 09:43:43,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:43:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-12 09:43:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:43:43,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:43,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:43,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:43:43,686 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash -689740303, now seen corresponding path program 1 times [2020-10-12 09:43:43,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:43,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184954365] [2020-10-12 09:43:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:43,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:43,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:43,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:43,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:44,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:44,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:43:44,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:44,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-12 09:43:44,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:43:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:43:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:43:44,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:44,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:44,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:44,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:44,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:44,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:44,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:44,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:44,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:44,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:44,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:44,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:43:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:44,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:44,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:44,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 09:43:44,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:43:44,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-12 09:43:44,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:43:44,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:43:45,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184954365] [2020-10-12 09:43:45,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:45,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 09:43:45,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838539185] [2020-10-12 09:43:45,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:43:45,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:43:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:43:45,009 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 7 states. [2020-10-12 09:43:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:45,368 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2020-10-12 09:43:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:45,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-12 09:43:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:45,370 INFO L225 Difference]: With dead ends: 112 [2020-10-12 09:43:45,370 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 09:43:45,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:43:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 09:43:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-10-12 09:43:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 09:43:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-10-12 09:43:45,384 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 29 [2020-10-12 09:43:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:45,385 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-10-12 09:43:45,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:43:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-10-12 09:43:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:43:45,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:45,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:45,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:43:45,388 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1600492990, now seen corresponding path program 1 times [2020-10-12 09:43:45,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:45,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450709582] [2020-10-12 09:43:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:45,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:43:45,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:45,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-12 09:43:45,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:43:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:43:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:43:45,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:45,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:45,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:45,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:43:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:45,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 09:43:45,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:45,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 09:43:45,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:43:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 09:43:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:43:45,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:43:45,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450709582] [2020-10-12 09:43:45,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:45,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:43:45,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980769174] [2020-10-12 09:43:45,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:43:45,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:45,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:43:45,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:43:45,586 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand 4 states. [2020-10-12 09:43:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:45,773 INFO L93 Difference]: Finished difference Result 111 states and 141 transitions. [2020-10-12 09:43:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:43:45,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-12 09:43:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:45,777 INFO L225 Difference]: With dead ends: 111 [2020-10-12 09:43:45,777 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:43:45,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:43:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:43:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-12 09:43:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 09:43:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2020-10-12 09:43:45,796 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 32 [2020-10-12 09:43:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:45,799 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2020-10-12 09:43:45,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:43:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2020-10-12 09:43:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:43:45,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:45,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:45,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:43:45,802 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2030512197, now seen corresponding path program 1 times [2020-10-12 09:43:45,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:45,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699746752] [2020-10-12 09:43:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:47,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:43:47,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-12 09:43:47,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:43:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:43:47,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:47,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:47,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:47,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:47,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:47,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:47,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:43:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:47,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 09:43:47,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:47,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 09:43:47,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:47,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:43:47,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:43:47,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:43:47,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:43:47,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699746752] [2020-10-12 09:43:47,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:47,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:43:47,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278075122] [2020-10-12 09:43:47,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:43:47,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:43:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:43:47,239 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand 9 states. [2020-10-12 09:43:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:47,659 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-10-12 09:43:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:43:47,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-12 09:43:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:47,662 INFO L225 Difference]: With dead ends: 120 [2020-10-12 09:43:47,663 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 09:43:47,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:43:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 09:43:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-12 09:43:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 09:43:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2020-10-12 09:43:47,681 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 35 [2020-10-12 09:43:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:47,682 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2020-10-12 09:43:47,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:43:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2020-10-12 09:43:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:43:47,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:47,685 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:47,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:43:47,686 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1073105843, now seen corresponding path program 1 times [2020-10-12 09:43:47,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:47,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073914374] [2020-10-12 09:43:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:47,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:52,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:52,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:43:52,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:43:52,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:43:52,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:43:52,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:52,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:52,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:52,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:52,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:52,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:52,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:52,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:52,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:52,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:43:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:52,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:52,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:52,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 09:43:52,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:52,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-12 09:43:52,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:52,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:43:52,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:43:52,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:43:52,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:52,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:43:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:52,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:52,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:52,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:43:52,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:52,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:52,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:52,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:52,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:43:52,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:52,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:52,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073914374] [2020-10-12 09:43:52,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:52,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 09:43:52,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403533988] [2020-10-12 09:43:52,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:43:52,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:52,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:43:52,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:52,935 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand 8 states. [2020-10-12 09:43:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:53,275 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2020-10-12 09:43:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:43:53,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-12 09:43:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:53,278 INFO L225 Difference]: With dead ends: 130 [2020-10-12 09:43:53,278 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 09:43:53,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:43:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 09:43:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-12 09:43:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:43:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-10-12 09:43:53,300 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 37 [2020-10-12 09:43:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:53,300 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-10-12 09:43:53,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:43:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-10-12 09:43:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:43:53,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:53,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:53,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:43:53,302 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:53,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1918489355, now seen corresponding path program 1 times [2020-10-12 09:43:53,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:53,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615067688] [2020-10-12 09:43:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:53,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:53,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:53,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:58,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:58,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:43:58,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:43:58,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:43:58,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:43:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:43:58,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:58,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:58,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:58,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:58,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:58,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:58,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:58,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:58,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:58,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:43:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:58,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:58,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:58,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:58,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:43:58,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:43:58,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 09:43:58,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:43:58,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:43:59,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615067688] [2020-10-12 09:43:59,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:59,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:59,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13352169] [2020-10-12 09:43:59,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:59,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:59,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:59,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:59,070 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 10 states. [2020-10-12 09:44:01,954 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-12 09:44:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:08,492 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2020-10-12 09:44:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:44:08,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-12 09:44:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:08,494 INFO L225 Difference]: With dead ends: 148 [2020-10-12 09:44:08,494 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 09:44:08,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:44:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 09:44:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-10-12 09:44:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 09:44:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2020-10-12 09:44:08,510 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 36 [2020-10-12 09:44:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:08,510 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2020-10-12 09:44:08,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2020-10-12 09:44:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:44:08,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:08,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:08,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:44:08,512 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:08,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1976319871, now seen corresponding path program 1 times [2020-10-12 09:44:08,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:08,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995600707] [2020-10-12 09:44:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:08,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:08,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:08,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:44:08,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:08,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-12 09:44:08,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:44:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:44:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 09:44:08,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:08,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:08,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:08,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:08,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:08,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:08,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:08,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:08,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:08,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:08,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:08,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:08,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:44:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:08,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:08,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:08,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 09:44:08,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:08,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 09:44:08,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:08,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:44:08,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995600707] [2020-10-12 09:44:08,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:08,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:44:08,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30008097] [2020-10-12 09:44:08,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:44:08,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:44:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:44:08,842 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand 8 states. [2020-10-12 09:44:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:09,160 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2020-10-12 09:44:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:44:09,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-12 09:44:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:09,162 INFO L225 Difference]: With dead ends: 141 [2020-10-12 09:44:09,162 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 09:44:09,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 09:44:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2020-10-12 09:44:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 09:44:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2020-10-12 09:44:09,187 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 37 [2020-10-12 09:44:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:09,188 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2020-10-12 09:44:09,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:44:09,188 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2020-10-12 09:44:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:44:09,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:09,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:09,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:44:09,190 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:09,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1974472829, now seen corresponding path program 2 times [2020-10-12 09:44:09,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:09,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913808281] [2020-10-12 09:44:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:10,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:14,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:14,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:44:14,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:44:14,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:44:14,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:14,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:44:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:44:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:44:14,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:14,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:14,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:14,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:44:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:14,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:14,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:14,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 09:44:14,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:44:14,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 09:44:14,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:44:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:44:14,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:44:14,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913808281] [2020-10-12 09:44:14,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:14,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:44:14,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731850576] [2020-10-12 09:44:14,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:44:14,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:44:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:44:14,756 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand 11 states. [2020-10-12 09:44:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:15,962 INFO L93 Difference]: Finished difference Result 210 states and 282 transitions. [2020-10-12 09:44:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:44:15,963 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-12 09:44:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:15,965 INFO L225 Difference]: With dead ends: 210 [2020-10-12 09:44:15,965 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 09:44:15,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:44:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 09:44:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 146. [2020-10-12 09:44:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 09:44:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2020-10-12 09:44:15,995 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 37 [2020-10-12 09:44:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:15,995 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2020-10-12 09:44:15,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:44:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2020-10-12 09:44:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:44:15,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:15,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:15,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:44:15,997 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:15,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1509300799, now seen corresponding path program 1 times [2020-10-12 09:44:15,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:15,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040787888] [2020-10-12 09:44:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:44:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-12 09:44:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:44:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 09:44:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:44:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:16,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:16,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:16,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:16,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:16,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:16,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:16,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:16,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:16,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:16,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:16,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:44:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:16,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 09:44:16,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:16,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:44:16,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:16,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:44:16,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:44:16,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040787888] [2020-10-12 09:44:16,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:16,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:44:16,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028767394] [2020-10-12 09:44:16,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:44:16,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:44:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:16,602 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand 10 states. [2020-10-12 09:44:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:17,401 INFO L93 Difference]: Finished difference Result 262 states and 359 transitions. [2020-10-12 09:44:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:44:17,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-12 09:44:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:17,404 INFO L225 Difference]: With dead ends: 262 [2020-10-12 09:44:17,404 INFO L226 Difference]: Without dead ends: 215 [2020-10-12 09:44:17,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:44:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-12 09:44:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 161. [2020-10-12 09:44:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 09:44:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 211 transitions. [2020-10-12 09:44:17,438 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 211 transitions. Word has length 37 [2020-10-12 09:44:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:17,439 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 211 transitions. [2020-10-12 09:44:17,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 211 transitions. [2020-10-12 09:44:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:44:17,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:17,440 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:17,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:44:17,440 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash 499270742, now seen corresponding path program 1 times [2020-10-12 09:44:17,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:17,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084011077] [2020-10-12 09:44:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:17,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:17,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:17,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:19,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:22,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:44:22,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:44:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:44:22,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:44:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:44:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 09:44:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:22,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:22,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:22,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:22,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:22,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:22,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:22,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:22,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:22,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:22,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:22,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:44:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:22,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:22,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 09:44:22,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:22,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-12 09:44:22,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:22,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:44:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:44:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:22,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:44:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:22,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:22,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:44:22,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:22,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:44:22,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:22,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:44:22,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:22,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:44:22,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:44:22,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084011077] [2020-10-12 09:44:22,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:22,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:44:22,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887852134] [2020-10-12 09:44:22,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:44:22,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:44:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:22,809 INFO L87 Difference]: Start difference. First operand 161 states and 211 transitions. Second operand 10 states. [2020-10-12 09:44:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:23,685 INFO L93 Difference]: Finished difference Result 218 states and 285 transitions. [2020-10-12 09:44:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:44:23,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-12 09:44:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:23,687 INFO L225 Difference]: With dead ends: 218 [2020-10-12 09:44:23,687 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 09:44:23,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:44:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 09:44:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 157. [2020-10-12 09:44:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 09:44:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2020-10-12 09:44:23,710 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 40 [2020-10-12 09:44:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:23,710 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2020-10-12 09:44:23,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2020-10-12 09:44:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:44:23,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:23,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:23,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:44:23,712 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:23,712 INFO L82 PathProgramCache]: Analyzing trace with hash -893450074, now seen corresponding path program 1 times [2020-10-12 09:44:23,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:23,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846183480] [2020-10-12 09:44:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:23,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:24,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:24,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:24,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:28,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:28,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:44:28,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:44:28,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:44:28,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:44:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:44:28,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:44:28,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:44:29,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:29,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:29,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:29,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:29,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:29,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:29,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:29,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:29,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:29,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:44:29,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:44:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:29,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:29,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:44:29,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:29,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-12 09:44:29,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:44:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:44:29,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:44:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:44:29,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846183480] [2020-10-12 09:44:29,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:29,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:44:29,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701631051] [2020-10-12 09:44:29,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:44:29,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:44:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:44:29,334 INFO L87 Difference]: Start difference. First operand 157 states and 204 transitions. Second operand 14 states. [2020-10-12 09:44:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:30,220 INFO L93 Difference]: Finished difference Result 274 states and 359 transitions. [2020-10-12 09:44:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:44:30,220 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-12 09:44:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:30,222 INFO L225 Difference]: With dead ends: 274 [2020-10-12 09:44:30,222 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 09:44:30,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:44:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 09:44:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2020-10-12 09:44:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 09:44:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 224 transitions. [2020-10-12 09:44:30,249 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 224 transitions. Word has length 39 [2020-10-12 09:44:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:30,249 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 224 transitions. [2020-10-12 09:44:30,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:44:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 224 transitions. [2020-10-12 09:44:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:44:30,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:30,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:30,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:44:30,251 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1679519854, now seen corresponding path program 2 times [2020-10-12 09:44:30,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:30,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145348943] [2020-10-12 09:44:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:35,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:44:35,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:44:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:44:35,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:44:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:39,562 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-12 09:44:39,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:39,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:39,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:39,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:39,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:39,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:39,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:39,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:44:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:39,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:39,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:39,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 09:44:39,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:44:39,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 09:44:39,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:44:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:39,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:44:39,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:44:40,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145348943] [2020-10-12 09:44:40,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:40,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:44:40,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482538215] [2020-10-12 09:44:40,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:44:40,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:40,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:44:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:44:40,025 INFO L87 Difference]: Start difference. First operand 175 states and 224 transitions. Second operand 15 states. [2020-10-12 09:44:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:41,612 INFO L93 Difference]: Finished difference Result 291 states and 382 transitions. [2020-10-12 09:44:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:44:41,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-12 09:44:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:41,615 INFO L225 Difference]: With dead ends: 291 [2020-10-12 09:44:41,615 INFO L226 Difference]: Without dead ends: 262 [2020-10-12 09:44:41,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:44:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-12 09:44:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 162. [2020-10-12 09:44:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-12 09:44:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 207 transitions. [2020-10-12 09:44:41,641 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 207 transitions. Word has length 40 [2020-10-12 09:44:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:41,642 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 207 transitions. [2020-10-12 09:44:41,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:44:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 207 transitions. [2020-10-12 09:44:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:44:41,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:41,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:41,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:44:41,644 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:41,644 INFO L82 PathProgramCache]: Analyzing trace with hash 534214692, now seen corresponding path program 1 times [2020-10-12 09:44:41,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:41,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050613809] [2020-10-12 09:44:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:41,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:42,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:46,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:44:46,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:44:46,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:44:46,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:44:46,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:46,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:46,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:46,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:46,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:46,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:46,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:46,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:46,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:46,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:46,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:44:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:46,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:44:46,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:44:46,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-12 09:44:46,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:46,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:44:46,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:46,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:44:46,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:44:47,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050613809] [2020-10-12 09:44:47,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:47,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:44:47,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745951892] [2020-10-12 09:44:47,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:44:47,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:47,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:44:47,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:44:47,010 INFO L87 Difference]: Start difference. First operand 162 states and 207 transitions. Second operand 12 states. [2020-10-12 09:44:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:54,281 INFO L93 Difference]: Finished difference Result 288 states and 380 transitions. [2020-10-12 09:44:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:44:54,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-12 09:44:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:54,284 INFO L225 Difference]: With dead ends: 288 [2020-10-12 09:44:54,285 INFO L226 Difference]: Without dead ends: 261 [2020-10-12 09:44:54,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:44:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-12 09:44:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 169. [2020-10-12 09:44:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 09:44:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 222 transitions. [2020-10-12 09:44:54,331 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 222 transitions. Word has length 41 [2020-10-12 09:44:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:54,332 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 222 transitions. [2020-10-12 09:44:54,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:44:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 222 transitions. [2020-10-12 09:44:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:44:54,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:54,334 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:54,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:44:54,335 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1701799049, now seen corresponding path program 1 times [2020-10-12 09:44:54,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:54,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023282568] [2020-10-12 09:44:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:54,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:55,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:57,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:57,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:57,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:57,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:57,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:57,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:59,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:59,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:44:59,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 09:44:59,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:44:59,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:44:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 09:44:59,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:01,520 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-10-12 09:45:01,653 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2020-10-12 09:45:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:01,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:01,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:01,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:01,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:01,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:01,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:01,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:01,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:01,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:01,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:45:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:01,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:01,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:02,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:02,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 09:45:02,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:45:02,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 09:45:02,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:02,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:45:02,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:02,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:45:02,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:04,263 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-12 09:45:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:45:04,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023282568] [2020-10-12 09:45:04,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:04,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:04,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705965458] [2020-10-12 09:45:04,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:04,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:04,466 INFO L87 Difference]: Start difference. First operand 169 states and 222 transitions. Second operand 12 states. [2020-10-12 09:45:09,109 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-12 09:45:09,373 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-12 09:45:09,597 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2020-10-12 09:45:12,173 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-12 09:45:13,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:13,171 INFO L93 Difference]: Finished difference Result 287 states and 387 transitions. [2020-10-12 09:45:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:45:13,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-12 09:45:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:13,174 INFO L225 Difference]: With dead ends: 287 [2020-10-12 09:45:13,175 INFO L226 Difference]: Without dead ends: 277 [2020-10-12 09:45:13,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:45:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-12 09:45:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 207. [2020-10-12 09:45:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-12 09:45:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2020-10-12 09:45:13,210 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 42 [2020-10-12 09:45:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:13,210 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2020-10-12 09:45:13,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2020-10-12 09:45:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:45:13,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:13,212 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:13,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:45:13,212 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2064411115, now seen corresponding path program 2 times [2020-10-12 09:45:13,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:13,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402457945] [2020-10-12 09:45:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:13,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:18,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:18,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:45:18,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 09:45:18,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:45:18,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:18,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:45:18,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:18,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:45:18,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:18,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:18,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:18,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:18,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:18,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:18,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:18,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:18,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:18,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:45:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:18,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:18,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:18,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:18,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:45:18,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:45:18,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 09:45:18,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:18,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:45:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:45:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:45:18,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 09:45:18,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402457945] [2020-10-12 09:45:18,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:18,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:45:18,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956214044] [2020-10-12 09:45:18,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:45:18,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:45:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:45:18,426 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand 10 states. [2020-10-12 09:45:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:18,890 INFO L93 Difference]: Finished difference Result 280 states and 359 transitions. [2020-10-12 09:45:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:45:18,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-12 09:45:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:18,893 INFO L225 Difference]: With dead ends: 280 [2020-10-12 09:45:18,893 INFO L226 Difference]: Without dead ends: 203 [2020-10-12 09:45:18,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:45:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-12 09:45:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2020-10-12 09:45:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 09:45:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 254 transitions. [2020-10-12 09:45:18,926 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 254 transitions. Word has length 42 [2020-10-12 09:45:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:18,927 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 254 transitions. [2020-10-12 09:45:18,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:45:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 254 transitions. [2020-10-12 09:45:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:45:18,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:18,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:18,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:45:18,930 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash -487499550, now seen corresponding path program 2 times [2020-10-12 09:45:18,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:18,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744222326] [2020-10-12 09:45:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:18,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:23,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:23,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:45:23,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:45:23,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:45:23,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:23,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:45:23,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:45:23,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:24,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:24,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:24,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:24,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:24,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:24,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:24,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:24,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:24,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:24,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 09:45:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:24,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:24,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:45:24,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:24,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 09:45:24,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:24,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:45:24,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:45:24,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:45:24,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:45:24,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744222326] [2020-10-12 09:45:24,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:24,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:24,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461972655] [2020-10-12 09:45:24,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:24,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:24,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:24,273 INFO L87 Difference]: Start difference. First operand 198 states and 254 transitions. Second operand 12 states. [2020-10-12 09:45:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:25,037 INFO L93 Difference]: Finished difference Result 302 states and 390 transitions. [2020-10-12 09:45:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:45:25,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-12 09:45:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:25,040 INFO L225 Difference]: With dead ends: 302 [2020-10-12 09:45:25,040 INFO L226 Difference]: Without dead ends: 219 [2020-10-12 09:45:25,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:45:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-12 09:45:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2020-10-12 09:45:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 09:45:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 256 transitions. [2020-10-12 09:45:25,065 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 256 transitions. Word has length 43 [2020-10-12 09:45:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:25,066 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 256 transitions. [2020-10-12 09:45:25,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 256 transitions. [2020-10-12 09:45:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:45:25,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:25,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:25,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:45:25,067 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1853681063, now seen corresponding path program 1 times [2020-10-12 09:45:25,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:25,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810147593] [2020-10-12 09:45:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:25,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:30,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:30,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:45:30,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:45:30,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:45:30,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:30,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:45:30,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:30,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:45:30,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:30,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:30,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:30,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:30,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:30,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:30,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:30,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:45:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:30,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:30,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 09:45:30,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:45:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-12 09:45:30,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:45:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:45:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:45:30,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:45:30,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810147593] [2020-10-12 09:45:30,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:30,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:30,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472439859] [2020-10-12 09:45:30,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:30,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:30,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:30,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:30,443 INFO L87 Difference]: Start difference. First operand 200 states and 256 transitions. Second operand 12 states. [2020-10-12 09:45:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:31,287 INFO L93 Difference]: Finished difference Result 260 states and 334 transitions. [2020-10-12 09:45:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:45:31,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-12 09:45:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:31,289 INFO L225 Difference]: With dead ends: 260 [2020-10-12 09:45:31,290 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 09:45:31,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:45:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 09:45:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 198. [2020-10-12 09:45:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 09:45:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 252 transitions. [2020-10-12 09:45:31,321 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 252 transitions. Word has length 43 [2020-10-12 09:45:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:31,321 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 252 transitions. [2020-10-12 09:45:31,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 252 transitions. [2020-10-12 09:45:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:45:31,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:31,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:31,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:45:31,323 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash 456040685, now seen corresponding path program 3 times [2020-10-12 09:45:31,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:31,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472356249] [2020-10-12 09:45:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:31,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:31,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:31,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:31,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:31,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:33,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:36,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:36,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:45:36,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 09:45:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:45:36,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:45:36,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:36,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:45:36,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:36,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:36,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:36,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:36,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:36,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:36,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:36,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:36,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:36,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:36,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:36,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:36,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:45:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:36,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:36,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:45:36,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 09:45:36,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:45:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:45:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:45:36,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472356249] [2020-10-12 09:45:36,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:36,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:45:36,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182908315] [2020-10-12 09:45:36,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:45:36,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:36,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:45:36,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:45:36,597 INFO L87 Difference]: Start difference. First operand 198 states and 252 transitions. Second operand 10 states. [2020-10-12 09:45:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:37,310 INFO L93 Difference]: Finished difference Result 224 states and 284 transitions. [2020-10-12 09:45:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:45:37,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-12 09:45:37,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:37,313 INFO L225 Difference]: With dead ends: 224 [2020-10-12 09:45:37,313 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 09:45:37,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:45:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 09:45:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2020-10-12 09:45:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 09:45:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2020-10-12 09:45:37,344 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 44 [2020-10-12 09:45:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:37,344 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2020-10-12 09:45:37,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:45:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2020-10-12 09:45:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:45:37,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:37,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:37,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:45:37,347 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1049443872, now seen corresponding path program 3 times [2020-10-12 09:45:37,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:37,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540664432] [2020-10-12 09:45:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:37,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:45:37,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:37,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:37,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:37,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:45:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:37,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:37,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:37,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:45:37,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:37,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:45:37,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:37,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:37,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 09:45:37,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540664432] [2020-10-12 09:45:37,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:37,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:45:37,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805034963] [2020-10-12 09:45:37,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:45:37,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:45:37,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:45:37,653 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand 9 states. [2020-10-12 09:45:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:38,078 INFO L93 Difference]: Finished difference Result 171 states and 215 transitions. [2020-10-12 09:45:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:45:38,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-12 09:45:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:38,080 INFO L225 Difference]: With dead ends: 171 [2020-10-12 09:45:38,081 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 09:45:38,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:45:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 09:45:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2020-10-12 09:45:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 09:45:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2020-10-12 09:45:38,103 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 45 [2020-10-12 09:45:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:38,104 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2020-10-12 09:45:38,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:45:38,104 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2020-10-12 09:45:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:45:38,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:38,105 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:38,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:45:38,105 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash 376223843, now seen corresponding path program 2 times [2020-10-12 09:45:38,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:38,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040975934] [2020-10-12 09:45:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:38,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:40,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:40,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:40,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:43,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:43,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:45:43,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:43,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:45:43,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:43,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:45:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:45:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:43,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:43,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:43,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:43,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:43,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:43,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:43,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:43,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:43,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:43,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:43,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:43,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:45:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:43,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:43,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:43,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:43,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 09:45:43,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:45:43,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-12 09:45:43,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:45:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:45:43,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 09:45:43,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040975934] [2020-10-12 09:45:43,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:43,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:45:43,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925434701] [2020-10-12 09:45:43,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:45:43,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:43,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:45:43,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:45:43,546 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand 13 states. [2020-10-12 09:45:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:44,450 INFO L93 Difference]: Finished difference Result 262 states and 343 transitions. [2020-10-12 09:45:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:45:44,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-12 09:45:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:44,453 INFO L225 Difference]: With dead ends: 262 [2020-10-12 09:45:44,453 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 09:45:44,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:45:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 09:45:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2020-10-12 09:45:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 09:45:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 235 transitions. [2020-10-12 09:45:44,485 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 235 transitions. Word has length 47 [2020-10-12 09:45:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:44,486 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 235 transitions. [2020-10-12 09:45:44,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:45:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 235 transitions. [2020-10-12 09:45:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:45:44,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:44,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:44,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:45:44,487 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1075441379, now seen corresponding path program 1 times [2020-10-12 09:45:44,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:44,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215860800] [2020-10-12 09:45:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:44,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:45,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:45,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:45:45,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:45,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-12 09:45:45,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:45,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:45:45,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 09:45:45,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:45:45,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:45:45,392 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-12 09:45:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:45,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:45,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:45,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:45,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:45,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:45,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:45,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:45,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:45:45,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:45:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:45,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:45,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:45,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 09:45:45,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-12 09:45:45,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:45:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:45:45,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 09:45:45,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215860800] [2020-10-12 09:45:45,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:45,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:45,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048719774] [2020-10-12 09:45:45,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:45,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:45,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:45,718 INFO L87 Difference]: Start difference. First operand 183 states and 235 transitions. Second operand 12 states. [2020-10-12 09:45:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:46,689 INFO L93 Difference]: Finished difference Result 295 states and 393 transitions. [2020-10-12 09:45:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:45:46,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-12 09:45:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:46,692 INFO L225 Difference]: With dead ends: 295 [2020-10-12 09:45:46,692 INFO L226 Difference]: Without dead ends: 256 [2020-10-12 09:45:46,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:45:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-12 09:45:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 193. [2020-10-12 09:45:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 09:45:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 248 transitions. [2020-10-12 09:45:46,723 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 248 transitions. Word has length 47 [2020-10-12 09:45:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:46,724 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 248 transitions. [2020-10-12 09:45:46,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 248 transitions. [2020-10-12 09:45:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:45:46,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:46,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:46,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:45:46,726 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1897660079, now seen corresponding path program 4 times [2020-10-12 09:45:46,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:46,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701865975] [2020-10-12 09:45:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:46,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:46,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:51,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:51,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:45:51,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:45:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:45:51,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:45:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 09:45:51,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:51,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:51,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:51,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:51,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:51,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:51,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:51,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:51,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:45:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:51,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:51,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:45:51,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 09:45:51,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:45:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:51,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:45:51,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:45:51,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701865975] [2020-10-12 09:45:51,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:51,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:51,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637205087] [2020-10-12 09:45:51,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:51,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:51,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:51,979 INFO L87 Difference]: Start difference. First operand 193 states and 248 transitions. Second operand 12 states. [2020-10-12 09:45:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:53,360 INFO L93 Difference]: Finished difference Result 359 states and 474 transitions. [2020-10-12 09:45:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:45:53,361 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-12 09:45:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:53,363 INFO L225 Difference]: With dead ends: 359 [2020-10-12 09:45:53,363 INFO L226 Difference]: Without dead ends: 324 [2020-10-12 09:45:53,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:45:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-12 09:45:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 249. [2020-10-12 09:45:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 09:45:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 324 transitions. [2020-10-12 09:45:53,414 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 324 transitions. Word has length 48 [2020-10-12 09:45:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:53,414 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 324 transitions. [2020-10-12 09:45:53,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 324 transitions. [2020-10-12 09:45:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:45:53,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:53,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:53,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:45:53,416 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash -800756687, now seen corresponding path program 5 times [2020-10-12 09:45:53,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:53,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714410416] [2020-10-12 09:45:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:53,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:53,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:53,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:55,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:55,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:56,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:58,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:45:58,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:58,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:58,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:58,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:58,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:58,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:58,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:58,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:58,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:58,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:58,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:58,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:45:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:58,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:58,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:58,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:45:58,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 09:45:58,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:45:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:45:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:45:58,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 09:45:58,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714410416] [2020-10-12 09:45:58,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:58,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:45:58,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152208193] [2020-10-12 09:45:58,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:45:58,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:45:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:45:58,904 INFO L87 Difference]: Start difference. First operand 249 states and 324 transitions. Second operand 14 states. [2020-10-12 09:45:59,997 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-10-12 09:46:00,307 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2020-10-12 09:46:00,573 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-10-12 09:46:01,530 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-12 09:46:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:06,617 INFO L93 Difference]: Finished difference Result 399 states and 526 transitions. [2020-10-12 09:46:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:46:06,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-12 09:46:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:06,621 INFO L225 Difference]: With dead ends: 399 [2020-10-12 09:46:06,621 INFO L226 Difference]: Without dead ends: 292 [2020-10-12 09:46:06,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:46:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-12 09:46:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-12 09:46:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-12 09:46:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 326 transitions. [2020-10-12 09:46:06,668 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 326 transitions. Word has length 50 [2020-10-12 09:46:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:06,668 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 326 transitions. [2020-10-12 09:46:06,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:46:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 326 transitions. [2020-10-12 09:46:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:46:06,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:06,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:06,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:46:06,670 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash -190808862, now seen corresponding path program 2 times [2020-10-12 09:46:06,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:06,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613517736] [2020-10-12 09:46:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:06,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:07,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:07,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:11,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:46:11,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:46:11,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:46:11,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:46:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:46:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:46:11,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:11,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:11,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:11,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:46:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:11,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:11,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 09:46:11,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:46:11,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-12 09:46:11,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:46:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:46:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:46:11,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 09:46:12,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613517736] [2020-10-12 09:46:12,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:12,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:46:12,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364290557] [2020-10-12 09:46:12,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:46:12,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:46:12,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:46:12,163 INFO L87 Difference]: Start difference. First operand 251 states and 326 transitions. Second operand 12 states. [2020-10-12 09:46:17,012 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2020-10-12 09:46:19,296 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-12 09:46:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:19,866 INFO L93 Difference]: Finished difference Result 408 states and 542 transitions. [2020-10-12 09:46:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:46:19,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-12 09:46:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:19,870 INFO L225 Difference]: With dead ends: 408 [2020-10-12 09:46:19,870 INFO L226 Difference]: Without dead ends: 329 [2020-10-12 09:46:19,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:46:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-12 09:46:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 259. [2020-10-12 09:46:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 09:46:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 340 transitions. [2020-10-12 09:46:19,919 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 340 transitions. Word has length 51 [2020-10-12 09:46:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:19,919 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 340 transitions. [2020-10-12 09:46:19,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:46:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 340 transitions. [2020-10-12 09:46:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:46:19,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:19,921 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:19,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:46:19,921 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1351846530, now seen corresponding path program 4 times [2020-10-12 09:46:19,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:19,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193069419] [2020-10-12 09:46:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:19,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:20,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:20,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:20,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:24,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:24,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:46:24,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:24,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:46:24,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:24,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:46:24,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:24,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:46:24,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:25,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:25,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:25,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:25,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:25,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:25,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:46:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:25,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:25,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:25,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:46:25,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:25,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 09:46:25,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:46:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:46:25,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:46:25,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193069419] [2020-10-12 09:46:25,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:25,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:46:25,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031404654] [2020-10-12 09:46:25,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:46:25,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:46:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:46:25,169 INFO L87 Difference]: Start difference. First operand 259 states and 340 transitions. Second operand 12 states. [2020-10-12 09:46:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:26,300 INFO L93 Difference]: Finished difference Result 321 states and 423 transitions. [2020-10-12 09:46:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:46:26,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-12 09:46:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:26,303 INFO L225 Difference]: With dead ends: 321 [2020-10-12 09:46:26,303 INFO L226 Difference]: Without dead ends: 284 [2020-10-12 09:46:26,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:46:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-12 09:46:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2020-10-12 09:46:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-12 09:46:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 312 transitions. [2020-10-12 09:46:26,357 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 312 transitions. Word has length 51 [2020-10-12 09:46:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:26,357 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 312 transitions. [2020-10-12 09:46:26,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:46:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 312 transitions. [2020-10-12 09:46:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:46:26,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:26,366 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:26,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:46:26,367 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:26,367 INFO L82 PathProgramCache]: Analyzing trace with hash -550594189, now seen corresponding path program 6 times [2020-10-12 09:46:26,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:26,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485500320] [2020-10-12 09:46:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:26,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:26,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:26,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:46:26,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:26,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-12 09:46:26,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:46:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 09:46:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:46:26,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:27,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:27,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:27,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:27,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:27,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:27,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:27,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:27,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:27,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 09:46:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 09:46:27,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485500320] [2020-10-12 09:46:27,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:27,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:46:27,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522120315] [2020-10-12 09:46:27,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:46:27,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:27,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:46:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:46:27,018 INFO L87 Difference]: Start difference. First operand 241 states and 312 transitions. Second operand 10 states. [2020-10-12 09:46:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:27,513 INFO L93 Difference]: Finished difference Result 266 states and 344 transitions. [2020-10-12 09:46:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:46:27,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-12 09:46:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:27,516 INFO L225 Difference]: With dead ends: 266 [2020-10-12 09:46:27,516 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 09:46:27,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:46:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 09:46:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 247. [2020-10-12 09:46:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-12 09:46:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2020-10-12 09:46:27,563 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 52 [2020-10-12 09:46:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:27,564 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2020-10-12 09:46:27,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:46:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2020-10-12 09:46:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:46:27,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:27,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:27,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:46:27,566 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:27,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:27,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1406805949, now seen corresponding path program 1 times [2020-10-12 09:46:27,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:27,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588304179] [2020-10-12 09:46:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:27,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:30,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:30,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:30,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:31,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:31,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:31,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:32,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:32,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:32,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:46:32,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 09:46:32,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:46:32,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:46:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 09:46:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:46:32,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:32,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:32,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:32,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:32,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:32,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:32,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:32,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:32,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:32,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:46:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:32,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:32,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:32,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 09:46:32,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:32,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 09:46:32,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:32,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:46:32,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:32,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:46:32,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:33,246 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-12 09:46:33,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:46:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:33,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:33,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:33,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:46:33,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:33,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:33,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:46:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:33,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:46:33,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:33,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:46:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:33,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:46:33,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:46:33,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588304179] [2020-10-12 09:46:33,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:33,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:46:33,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171861026] [2020-10-12 09:46:33,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:46:33,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:46:33,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:46:33,348 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand 12 states. [2020-10-12 09:46:34,043 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-12 09:46:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:35,251 INFO L93 Difference]: Finished difference Result 331 states and 432 transitions. [2020-10-12 09:46:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:46:35,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-12 09:46:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:35,255 INFO L225 Difference]: With dead ends: 331 [2020-10-12 09:46:35,255 INFO L226 Difference]: Without dead ends: 279 [2020-10-12 09:46:35,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:46:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-12 09:46:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 255. [2020-10-12 09:46:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-12 09:46:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 326 transitions. [2020-10-12 09:46:35,307 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 326 transitions. Word has length 54 [2020-10-12 09:46:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:35,307 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 326 transitions. [2020-10-12 09:46:35,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:46:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 326 transitions. [2020-10-12 09:46:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:46:35,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:35,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:35,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:46:35,309 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:35,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1423964192, now seen corresponding path program 3 times [2020-10-12 09:46:35,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:35,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121708336] [2020-10-12 09:46:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:35,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:36,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:37,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2221 [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:46:37,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:40,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:40,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:40,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:40,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:40,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:40,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:40,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:40,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:46:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:40,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:40,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 09:46:40,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:40,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 09:46:40,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:46:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:46:40,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 09:46:40,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121708336] [2020-10-12 09:46:40,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:40,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:46:40,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206867835] [2020-10-12 09:46:40,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:46:40,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:46:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=407, Unknown=1, NotChecked=0, Total=462 [2020-10-12 09:46:40,850 INFO L87 Difference]: Start difference. First operand 255 states and 326 transitions. Second operand 22 states. [2020-10-12 09:46:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:44,967 INFO L93 Difference]: Finished difference Result 415 states and 529 transitions. [2020-10-12 09:46:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:46:44,968 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-12 09:46:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:44,970 INFO L225 Difference]: With dead ends: 415 [2020-10-12 09:46:44,970 INFO L226 Difference]: Without dead ends: 313 [2020-10-12 09:46:44,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=162, Invalid=1318, Unknown=2, NotChecked=0, Total=1482 [2020-10-12 09:46:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-12 09:46:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 270. [2020-10-12 09:46:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-12 09:46:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 345 transitions. [2020-10-12 09:46:45,020 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 345 transitions. Word has length 53 [2020-10-12 09:46:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:45,021 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 345 transitions. [2020-10-12 09:46:45,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:46:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 345 transitions. [2020-10-12 09:46:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:46:45,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:45,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:45,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:46:45,023 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1158821276, now seen corresponding path program 4 times [2020-10-12 09:46:45,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:45,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326155681] [2020-10-12 09:46:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:45,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:45,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:45,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:46:45,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:45,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-12 09:46:45,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:45,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:46:45,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 09:46:45,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:46:45,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:45,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:45,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:45,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:45,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:45,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:45,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:45,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:45,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:46:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:45,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:45,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 09:46:45,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:45,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-12 09:46:45,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:46:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:46:45,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 09:46:46,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326155681] [2020-10-12 09:46:46,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:46,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:46:46,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389018441] [2020-10-12 09:46:46,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:46:46,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:46,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:46:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:46:46,096 INFO L87 Difference]: Start difference. First operand 270 states and 345 transitions. Second operand 16 states. [2020-10-12 09:46:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:47,395 INFO L93 Difference]: Finished difference Result 327 states and 419 transitions. [2020-10-12 09:46:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:46:47,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-12 09:46:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:47,398 INFO L225 Difference]: With dead ends: 327 [2020-10-12 09:46:47,398 INFO L226 Difference]: Without dead ends: 290 [2020-10-12 09:46:47,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:46:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-12 09:46:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 267. [2020-10-12 09:46:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-12 09:46:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 341 transitions. [2020-10-12 09:46:47,438 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 341 transitions. Word has length 53 [2020-10-12 09:46:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:47,438 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 341 transitions. [2020-10-12 09:46:47,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:46:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 341 transitions. [2020-10-12 09:46:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:46:47,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:47,440 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:47,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:46:47,440 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:47,440 INFO L82 PathProgramCache]: Analyzing trace with hash 925346222, now seen corresponding path program 5 times [2020-10-12 09:46:47,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:47,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672883602] [2020-10-12 09:46:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:47,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:47,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:47,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:46:47,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:47,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-12 09:46:47,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:47,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:46:47,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 09:46:47,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:46:47,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:48,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:48,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:48,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:48,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:48,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:48,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:48,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:48,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:48,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:48,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:48,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:46:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:48,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:46:48,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 09:46:48,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672883602] [2020-10-12 09:46:48,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:48,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:46:48,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344982668] [2020-10-12 09:46:48,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:46:48,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:46:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:46:48,539 INFO L87 Difference]: Start difference. First operand 267 states and 341 transitions. Second operand 16 states. [2020-10-12 09:46:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:50,233 INFO L93 Difference]: Finished difference Result 391 states and 500 transitions. [2020-10-12 09:46:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:46:50,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-12 09:46:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:50,235 INFO L225 Difference]: With dead ends: 391 [2020-10-12 09:46:50,235 INFO L226 Difference]: Without dead ends: 299 [2020-10-12 09:46:50,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:46:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-12 09:46:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 278. [2020-10-12 09:46:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-12 09:46:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 354 transitions. [2020-10-12 09:46:50,278 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 354 transitions. Word has length 53 [2020-10-12 09:46:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:50,279 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 354 transitions. [2020-10-12 09:46:50,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:46:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 354 transitions. [2020-10-12 09:46:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:46:50,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:50,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:50,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:46:50,280 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash 20690564, now seen corresponding path program 1 times [2020-10-12 09:46:50,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:50,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701072524] [2020-10-12 09:46:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:51,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:51,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:51,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:51,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:52,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:55,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:55,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:46:55,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 09:46:55,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:46:55,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:55,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:46:55,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 09:46:55,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:46:55,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:55,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:55,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:55,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:55,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:55,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:46:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:55,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:55,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:55,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 09:46:55,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:55,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-12 09:46:55,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:55,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:46:55,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:55,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:46:55,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:55,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:46:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:55,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:55,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:55,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:46:55,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:55,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:55,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:55,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:46:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:46:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:55,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:46:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:55,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:55,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:55,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:46:55,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:55,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:55,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:55,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:46:55,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:46:55,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:46:55,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:46:55,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701072524] [2020-10-12 09:46:55,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:55,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:46:55,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323230368] [2020-10-12 09:46:55,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:46:55,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:46:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:46:55,558 INFO L87 Difference]: Start difference. First operand 278 states and 354 transitions. Second operand 12 states. [2020-10-12 09:46:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:56,424 INFO L93 Difference]: Finished difference Result 395 states and 509 transitions. [2020-10-12 09:46:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:46:56,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-12 09:46:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:56,427 INFO L225 Difference]: With dead ends: 395 [2020-10-12 09:46:56,427 INFO L226 Difference]: Without dead ends: 351 [2020-10-12 09:46:56,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:46:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-12 09:46:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 286. [2020-10-12 09:46:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-12 09:46:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 363 transitions. [2020-10-12 09:46:56,480 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 363 transitions. Word has length 55 [2020-10-12 09:46:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:56,481 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 363 transitions. [2020-10-12 09:46:56,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:46:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 363 transitions. [2020-10-12 09:46:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:46:56,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:56,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:56,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:46:56,483 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1411286804, now seen corresponding path program 1 times [2020-10-12 09:46:56,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:56,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087695681] [2020-10-12 09:46:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:56,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:56,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:56,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:56,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:56,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:56,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:57,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:57,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:47:01,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 09:47:01,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:47:01,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:47:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:47:01,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:01,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:01,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:01,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:01,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:01,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:47:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 09:47:01,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 09:47:01,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:47:01,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:47:01,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:47:01,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:01,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:47:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:47:01,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:01,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:47:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:01,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:47:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:47:01,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:01,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:47:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:47:01,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087695681] [2020-10-12 09:47:01,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:01,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:47:01,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879874171] [2020-10-12 09:47:01,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:47:01,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:47:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:47:01,872 INFO L87 Difference]: Start difference. First operand 286 states and 363 transitions. Second operand 12 states. [2020-10-12 09:47:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:02,721 INFO L93 Difference]: Finished difference Result 448 states and 577 transitions. [2020-10-12 09:47:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:47:02,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-12 09:47:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:02,724 INFO L225 Difference]: With dead ends: 448 [2020-10-12 09:47:02,724 INFO L226 Difference]: Without dead ends: 289 [2020-10-12 09:47:02,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:47:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-12 09:47:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2020-10-12 09:47:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-12 09:47:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 359 transitions. [2020-10-12 09:47:02,789 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 359 transitions. Word has length 56 [2020-10-12 09:47:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:02,789 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 359 transitions. [2020-10-12 09:47:02,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:47:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 359 transitions. [2020-10-12 09:47:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:47:02,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:02,791 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:02,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:47:02,792 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:02,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1753245124, now seen corresponding path program 7 times [2020-10-12 09:47:02,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:02,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184464913] [2020-10-12 09:47:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:47:07,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:47:07,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 09:47:07,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:47:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:47:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:10,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:10,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:10,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:10,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:10,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:10,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:10,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:10,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 09:47:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:47:10,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 2 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 09:47:10,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184464913] [2020-10-12 09:47:10,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:10,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:47:10,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007658394] [2020-10-12 09:47:10,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:47:10,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:47:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=152, Unknown=1, NotChecked=0, Total=182 [2020-10-12 09:47:10,254 INFO L87 Difference]: Start difference. First operand 286 states and 359 transitions. Second operand 14 states.